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During digestion, the energy in food is converted to energy the body can use. Scientists use calorimetry experiments to measure the calories, or energy, provided by food when it is digested or burned.
The relationship used to find the heat transferred energy 
In this experiment, food was burned over a Bunsen burner under a can of 200 ml of water. The temperature change of the water and mass change of the food can be used to determine the calories in four different food items.
Table 1 shows the values of the change of mass of the food items, the change in temperature of the water and the energy. Table 2 shows the energy to mass ratio of three of those food items.
Table 1
Roasted Peanut Peanut Cracker Cheese Puff
Water Temp. Initial 23.9 °C 33.2 °C 40.3 °C 53.9 °C
Water Temp. Final 30.0 °C 40.9 °C 55.9 °C 62.8 °C
Food Mass Initial 0.69 g 0.61 g 3.21 g 1.22 g
Food Mass Final 0.38 g 0.21 g 0.91 g 0.48 g
Energy 1.22 Cal 1.54 Cal 3.12 Cal 1.78 Cal
Table 2
Sample Energy to Mass Ratio (Cal/g)
1 1.36
2 3.93
3 2.40
According to information from Tables 1 and 2, order the samples' energy to mass ratios from least to greatest.
Roasted Peanut, Cracker, Cheese Puff, Peanut
Roasted Peanut, Peanut, Cracker, Cheese Puff
Cracker, Roasted Peanut, Cheese Puff, Peanut
Peanut, Roasted Peanut, Cheese Puff, Cracker
Explanation
The order of "Roasted Peanut, Cracker, Cheese Puff, Peanut" is correct and can be found after estimating the energy of the food sample divided by the difference between the initial and final masses of the samples.
During digestion, the energy in food is converted to energy the body can use. Scientists use calorimetry experiments to measure the calories, or energy, provided by food when it is digested or burned.
The relationship used to find the heat transferred energy
In this experiment, food was burned over a Bunsen burner under a can of 200 ml of water. The temperature change of the water and mass change of the food can be used to determine the calories in four different food items.
Table 1 shows the values of the change of mass of the food items, the change in temperature of the water and the energy. Table 2 shows the energy to mass ratio of three of those food items.
Table 1
Roasted Peanut Peanut Cracker Cheese Puff
Water Temp. Initial 23.9 °C 33.2 °C 40.3 °C 53.9 °C
Water Temp. Final 30.0 °C 40.9 °C 55.9 °C 62.8 °C
Food Mass Initial 0.69 g 0.61 g 3.21 g 1.22 g
Food Mass Final 0.38 g 0.21 g 0.91 g 0.48 g
Energy 1.22 Cal 1.54 Cal 3.12 Cal 1.78 Cal
Table 2
Sample Energy to Mass Ratio (Cal/g)
1 1.36
2 3.93
3 2.40
According to information from Tables 1 and 2, order the samples' energy to mass ratios from least to greatest.
Roasted Peanut, Cracker, Cheese Puff, Peanut
Roasted Peanut, Peanut, Cracker, Cheese Puff
Cracker, Roasted Peanut, Cheese Puff, Peanut
Peanut, Roasted Peanut, Cheese Puff, Cracker
Explanation
The order of "Roasted Peanut, Cracker, Cheese Puff, Peanut" is correct and can be found after estimating the energy of the food sample divided by the difference between the initial and final masses of the samples.
During digestion, the energy in food is converted to energy the body can use. Scientists use calorimetry experiments to measure the calories, or energy, provided by food when it is digested or burned.
The relationship used to find the heat transferred energy 
In this experiment, food was burned over a Bunsen burner under a can of 200 ml of water. The temperature change of the water and mass change of the food can be used to determine the calories in four different food items.
Table 1 shows the values of the change of mass of the food items, the change in temperature of the water and the energy. Table 2 shows the energy to mass ratio of three of those food items.
Table 1
Roasted Peanut Peanut Cracker Cheese Puff
Water Temp. Initial 23.9 °C 33.2 °C 40.3 °C 53.9 °C
Water Temp. Final 30.0 °C 40.9 °C 55.9 °C 62.8 °C
Food Mass Initial 0.69 g 0.61 g 3.21 g 1.22 g
Food Mass Final 0.38 g 0.21 g 0.91 g 0.48 g
Energy 1.22 Cal 1.54 Cal 3.12 Cal 1.78 Cal
Table 2
Sample Energy to Mass Ratio (Cal/g)
1 1.36
2 3.93
3 2.40
Based on the results shown in Table 1 from the experiment, what is the relationship between the mass change of the food sample and the calories in the food?
Explanation
Given the information in Table 1 along with the equation to calculate heat energy, one can see that mass change and energy are directly proportional. That is that as mass change increases, so does the energy.
During digestion, the energy in food is converted to energy the body can use. Scientists use calorimetry experiments to measure the calories, or energy, provided by food when it is digested or burned.
The relationship used to find the heat transferred energy
In this experiment, food was burned over a Bunsen burner under a can of 200 ml of water. The temperature change of the water and mass change of the food can be used to determine the calories in four different food items.
Table 1 shows the values of the change of mass of the food items, the change in temperature of the water and the energy. Table 2 shows the energy to mass ratio of three of those food items.
Table 1
Roasted Peanut Peanut Cracker Cheese Puff
Water Temp. Initial 23.9 °C 33.2 °C 40.3 °C 53.9 °C
Water Temp. Final 30.0 °C 40.9 °C 55.9 °C 62.8 °C
Food Mass Initial 0.69 g 0.61 g 3.21 g 1.22 g
Food Mass Final 0.38 g 0.21 g 0.91 g 0.48 g
Energy 1.22 Cal 1.54 Cal 3.12 Cal 1.78 Cal
Table 2
Sample Energy to Mass Ratio (Cal/g)
1 1.36
2 3.93
3 2.40
Based on the results shown in Table 1 from the experiment, what is the relationship between the mass change of the food sample and the calories in the food?
Explanation
Given the information in Table 1 along with the equation to calculate heat energy, one can see that mass change and energy are directly proportional. That is that as mass change increases, so does the energy.
During digestion, the energy in food is converted to energy the body can use. Scientists use calorimetry experiments to measure the calories, or energy, provided by food when it is digested or burned.
The relationship used to find the heat transferred energy 
In this experiment, food was burned over a Bunsen burner under a can of 200 ml of water. The temperature change of the water and mass change of the food can be used to determine the calories in four different food items.
Table 1 shows the values of the change of mass of the food items, the change in temperature of the water and the energy. Table 2 shows the energy to mass ratio of three of those food items.
Table 1
Roasted Peanut Peanut Cracker Cheese Puff
Water Temp. Initial 23.9 °C 33.2 °C 40.3 °C 53.9 °C
Water Temp. Final 30.0 °C 40.9 °C 55.9 °C 62.8 °C
Food Mass Initial 0.69 g 0.61 g 3.21 g 1.22 g
Food Mass Final 0.38 g 0.21 g 0.91 g 0.48 g
Energy 1.22 Cal 1.54 Cal 3.12 Cal 1.78 Cal
Table 2
Sample Energy to Mass Ratio (Cal/g)
1 1.36
2 3.93
3 2.40
Based on the information in Table 1, what variables must be measured in order to calculate the energy of the food samples?
Change in mass of the food and change in temperature of the water
Change in mass and temperature of the water
Change in temperature of the water alone
Change in mass of the food sample alone
Explanation
Based on the given equation for calculating heat energy, the heat capacity of the water, change of mass of the material, and change in temperature of the material must be measured. However, because the heat capacity of water is consistent, it does not affect the measure of the different calorie measurements. Additionally, because the change in heat of the food samples must approximately equal the change in temperature of the food item due to their proximity, only the change in temperature of the water and change in mass of the food samples needs to be known. Also, this answer is given in the description of the experiment.
During digestion, the energy in food is converted to energy the body can use. Scientists use calorimetry experiments to measure the calories, or energy, provided by food when it is digested or burned.
The relationship used to find the heat transferred energy
In this experiment, food was burned over a Bunsen burner under a can of 200 ml of water. The temperature change of the water and mass change of the food can be used to determine the calories in four different food items.
Table 1 shows the values of the change of mass of the food items, the change in temperature of the water and the energy. Table 2 shows the energy to mass ratio of three of those food items.
Table 1
Roasted Peanut Peanut Cracker Cheese Puff
Water Temp. Initial 23.9 °C 33.2 °C 40.3 °C 53.9 °C
Water Temp. Final 30.0 °C 40.9 °C 55.9 °C 62.8 °C
Food Mass Initial 0.69 g 0.61 g 3.21 g 1.22 g
Food Mass Final 0.38 g 0.21 g 0.91 g 0.48 g
Energy 1.22 Cal 1.54 Cal 3.12 Cal 1.78 Cal
Table 2
Sample Energy to Mass Ratio (Cal/g)
1 1.36
2 3.93
3 2.40
Based on the information in Table 1, what variables must be measured in order to calculate the energy of the food samples?
Change in mass of the food and change in temperature of the water
Change in mass and temperature of the water
Change in temperature of the water alone
Change in mass of the food sample alone
Explanation
Based on the given equation for calculating heat energy, the heat capacity of the water, change of mass of the material, and change in temperature of the material must be measured. However, because the heat capacity of water is consistent, it does not affect the measure of the different calorie measurements. Additionally, because the change in heat of the food samples must approximately equal the change in temperature of the food item due to their proximity, only the change in temperature of the water and change in mass of the food samples needs to be known. Also, this answer is given in the description of the experiment.
During digestion, the energy in food is converted to energy the body can use. Scientists use calorimetry experiments to measure the calories, or energy, provided by food when it is digested or burned.
The relationship used to find the heat transferred energy 
In this experiment, food was burned over a Bunsen burner under a can of 200 ml of water. The temperature change of the water and mass change of the food can be used to determine the calories in four different food items.
Table 1 shows the values of the change of mass of the food items, the change in temperature of the water and the energy. Table 2 shows the energy to mass ratio of three of those food items.
Table 1
Roasted Peanut Peanut Cracker Cheese Puff
Water Temp. Initial 23.9 °C 33.2 °C 40.3 °C 53.9 °C
Water Temp. Final 30.0 °C 40.9 °C 55.9 °C 62.8 °C
Food Mass Initial 0.69 g 0.61 g 3.21 g 1.22 g
Food Mass Final 0.38 g 0.21 g 0.91 g 0.48 g
Energy 1.22 Cal 1.54 Cal 3.12 Cal 1.78 Cal
Table 2
Sample Energy to Mass Ratio (Cal/g)
1 1.36
2 3.93
3 2.40
The student performing the experiment concluded that eating an amount of crackers would provide an athlete with more energy than eating the same amount of any of the other food samples. Do the results in Tables 1 and 2 support this claim?
No; crackers have a lower energy to mass ratio than another food sample.
Yes; crackers produce the most energy.
No; crackers produce a lower energy than other samples.
Yes; crackers have a higher energy to mass ratio than any other food samples.
Explanation
"No; crackers have a lower energy to mass ratio than another food sample" is correct because the question asks for the energy given from a consistent amount of each food sample. Therefore, the energy to mass ratio is what should be used to compare the food samples, not the energy given in the table.
During digestion, the energy in food is converted to energy the body can use. Scientists use calorimetry experiments to measure the calories, or energy, provided by food when it is digested or burned.
The relationship used to find the heat transferred energy
In this experiment, food was burned over a Bunsen burner under a can of 200 ml of water. The temperature change of the water and mass change of the food can be used to determine the calories in four different food items.
Table 1 shows the values of the change of mass of the food items, the change in temperature of the water and the energy. Table 2 shows the energy to mass ratio of three of those food items.
Table 1
Roasted Peanut Peanut Cracker Cheese Puff
Water Temp. Initial 23.9 °C 33.2 °C 40.3 °C 53.9 °C
Water Temp. Final 30.0 °C 40.9 °C 55.9 °C 62.8 °C
Food Mass Initial 0.69 g 0.61 g 3.21 g 1.22 g
Food Mass Final 0.38 g 0.21 g 0.91 g 0.48 g
Energy 1.22 Cal 1.54 Cal 3.12 Cal 1.78 Cal
Table 2
Sample Energy to Mass Ratio (Cal/g)
1 1.36
2 3.93
3 2.40
The student performing the experiment concluded that eating an amount of crackers would provide an athlete with more energy than eating the same amount of any of the other food samples. Do the results in Tables 1 and 2 support this claim?
No; crackers have a lower energy to mass ratio than another food sample.
Yes; crackers produce the most energy.
No; crackers produce a lower energy than other samples.
Yes; crackers have a higher energy to mass ratio than any other food samples.
Explanation
"No; crackers have a lower energy to mass ratio than another food sample" is correct because the question asks for the energy given from a consistent amount of each food sample. Therefore, the energy to mass ratio is what should be used to compare the food samples, not the energy given in the table.
Phase diagrams show what state of matter (solid, liquid, or gas) a chemical compound is in for a given temperature and pressure. Compounds 
The triple point is the temperature and pressure at which a compound exists simultaneously in all three states of matter and is found on the phase diagram where the three curves intersect.
Which answer choice ranks the Compounds A-C in order of increasing triple point temperatures?
Explanation
The triple point, as stated in the introduction, is found where all three curves intersect. The triple point temperature is the temperature at which this point occurs. The triple point temperatures for Compounds 
The rate of a reaction is defined as the rate at which the products of a reaction are produced. A researcher wants to investigate the rate of reaction of the combustion of theoretical compound 
The results of the experiment are shown in the table below. The brackets (\[\]) indicate concentration measured in mol/L.
According to the data, what is the apparent relationship between oxygen concentration and the rate of the reaction?
Positive and linear
Negative and linear
Positive and non-linear
Negative and non-linear
There is no discernible relationship.
Explanation
The correct answer is a positive, linear relationship. Although more data would be helpful in order to make this claim with certainty, it would appear that between trials 1 and 2, doubling the oxygen concentration exactly doubled the rate of reaction. This is a positive linearcorrelation.