AP Physics 2 Flashcards: Specific Heat And Thermal Conductivity

Study Specific Heat And Thermal Conductivity in AP Physics 2 with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

AP Physics 2

Specific Heat And Thermal Conductivity

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QUESTION

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What is the specific heat if $q=200 \text{ J}$ , $m=4 \text{ kg}$ , $\Delta T=2^{\circ}C$ ?

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ANSWER

$25 \text{ J/kg·K}$ . $c = q/(m\Delta T) = 200/(4 \times 2) = 25$

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Flashcard 1: What is the specific heat if $q=200 \text{ J}$ , $m=4 \text{ kg}$ , $\Delta T=2^{\circ}C$ ?

Answer: $25 \text{ J/kg·K}$ . $c = q/(m\Delta T) = 200/(4 \times 2) = 25$

Flashcard 2: State Fourier's Law of Heat Conduction.

Answer: Heat transfer rate $q = -kA\frac{\Delta T}{\Delta x}$ . Fundamental equation for conductive heat transfer.

Flashcard 3: What does the negative sign in $q = -kA\frac{\Delta T}{\Delta x}$ indicate?

Answer: Heat flows from high to low temperature. Heat flows down temperature gradient naturally.

Flashcard 4: What is the specific heat of water?

Answer: $4.18 \text{ J/g°C}$ . High value gives water thermal stability.

Flashcard 5: What does the negative sign in $q = -kA\frac{\Delta T}{\Delta x}$ indicate?

Answer: Heat flows from high to low temperature. Heat flows down temperature gradient naturally.

Flashcard 6: Find the specific heat capacity if $q=500 \text{ J}$ , $m=2 \text{ kg}$ , $\Delta T=5^{\circ}C$ .

Answer: $50 \text{ J/kg·K}$ . $c = q/(m\Delta T) = 500/(2 \times 5) = 50$

Flashcard 7: What is the thermal conductivity of copper?

Answer: Approximately $385 \text{ W/m·K}$ . High thermal conductivity metal.

Flashcard 8: What is the role of area $A$ in the thermal conductivity equation?

Answer: Cross-sectional area through which heat flows. Larger area increases heat transfer proportionally.

Flashcard 9: What is the thermal conductivity of air?

Answer: Approximately $0.024 \text{ W/m·K}$ . Air is good thermal insulator.

Flashcard 10: State Fourier's Law of Heat Conduction.

Answer: Heat transfer rate $q = -kA\frac{\Delta T}{\Delta x}$ . Fundamental equation for conductive heat transfer.

Flashcard 11: Which material typically has higher thermal conductivity: metal or wood?

Answer: Metal. Metals conduct heat much better than wood.

Flashcard 12: Define specific heat capacity.

Answer: Amount of heat required to raise 1 kg of substance by $1^{\circ}C$ . Intensive property measuring thermal inertia.

Flashcard 13: Find $c$ if $q=750 \text{ J}$ , $m=3 \text{ kg}$ , $\Delta T=10^{\circ}C$ .

Answer: $25 \text{ J/kg·K}$ . $c = q/(m\Delta T) = 750/(3 \times 10) = 25$

Flashcard 14: What is the specific heat if $q=200 \text{ J}$ , $m=4 \text{ kg}$ , $\Delta T=2^{\circ}C$ ?

Answer: $25 \text{ J/kg·K}$ . $c = q/(m\Delta T) = 200/(4 \times 2) = 25$

Flashcard 15: State the formula for thermal conductivity.

Answer: $q = -kA\frac{\Delta T}{\Delta x}$ . Fourier's Law relates heat flow to material properties.

Flashcard 16: Define specific heat capacity.

Answer: Amount of heat required to raise 1 kg of substance by $1^{\circ}C$ . Intensive property measuring thermal inertia.

Flashcard 17: What is the thermal conductivity of air?

Answer: Approximately $0.024 \text{ W/m·K}$ . Air is good thermal insulator.

Flashcard 18: What is the formula for specific heat capacity?

Answer: $c = \frac{q}{m\Delta T}$ . Rearranged from $q = mc\Delta T$ .

Flashcard 19: What is thermal conductivity?

Answer: Measure of a material's ability to conduct heat. Material property for heat conduction efficiency.

Flashcard 20: Which material typically has higher thermal conductivity: metal or wood?

Answer: Metal. Metals conduct heat much better than wood.

Flashcard 21: What is the temperature change if $1000 \text{ J}$ is added to $2 \text{ kg}$ of aluminum ( $c=900 \text{ J/kg·K}$ )?

Answer: $0.56^{\circ}C$ . $\Delta T = q/(mc) = 1000/(2 \times 900) = 0.56$

Flashcard 22: Find $c$ if $q=750 \text{ J}$ , $m=3 \text{ kg}$ , $\Delta T=10^{\circ}\text{C}$ .

Answer: $25 \text{ J/kg·K}$ . $c = q/(m\Delta T) = 750/(3 \times 10) = 25$

Flashcard 23: Identify the meaning of $\Delta x$ in thermal conductivity.

Answer: Thickness of the material. Greater thickness reduces heat transfer rate.

Flashcard 24: What is the effect of high specific heat on temperature change?

Answer: Smaller temperature change for given heat input. More energy needed for same temperature rise.

Flashcard 25: Calculate $\Delta T$ if $q=500 \text{ J}$ , $m=1 \text{ kg}$ , $c=250 \text{ J/kg·K}$ .

Answer: $2^{\circ}C$ . $\Delta T = q/(mc) = 500/(1 \times 250) = 2$

Flashcard 26: What is the unit of specific heat capacity in SI?

Answer: Joules per kilogram per Kelvin (J/kg·K). Energy per mass per temperature change.

Flashcard 27: What does $k$ represent in the thermal conductivity formula?

Answer: Thermal conductivity. Material's intrinsic heat conduction property.

Flashcard 28: Find $\Delta T$ if $q=2500 \text{ J}$ , $m=5 \text{ kg}$ , $c=500 \text{ J/kg·K}$ .

Answer: $1^{\circ}C$ . $\Delta T = q/(mc) = 2500/(5 \times 500) = 1$

Flashcard 29: What is the temperature change if $1000 \text{ J}$ is added to $2 \text{ kg}$ of aluminum ( $c=900 \text{ J/kg·K}$ )?

Answer: $0.56^{\circ}C$ . $\Delta T = q/(mc) = 1000/(2 \times 900) = 0.56$

Flashcard 30: What is the thermal conductivity of copper?

Answer: Approximately $385 \text{ W/m·K}$ . High thermal conductivity metal.

Flashcard 31: What is the unit of specific heat capacity in SI?

Answer: Joules per kilogram per Kelvin (J/kg·K). Energy per mass per temperature change.

Flashcard 32: State the formula for calculating heat transfer.

Answer: $q = mc\Delta T$ . Relates heat to mass, specific heat, and temperature change.

Flashcard 33: What is the effect of high specific heat on temperature change?

Answer: Smaller temperature change for given heat input. More energy needed for same temperature rise.

Flashcard 34: What is the role of area $A$ in the thermal conductivity equation?

Answer: Cross-sectional area through which heat flows. Larger area increases heat transfer proportionally.

Flashcard 35: What is the specific heat of water?

Answer: $4.18 \text{ J/g°C}$ . High value gives water thermal stability.

Flashcard 36: What does $q$ represent in heat equations?

Answer: Heat transfer. Heat energy or heat flow rate.

Flashcard 37: Find the specific heat if $q=360 \text{ J}$ , $m=2 \text{ kg}$ , $\Delta T=2^{\circ}C$ .

Answer: $90 \text{ J/kg·K}$ . $c = q/(m\Delta T) = 360/(2 \times 2) = 90$

Flashcard 38: Find the mass if $q=1500 \text{ J}$ , $c=200 \text{ J/kg·K}$ , $\Delta T=3^{\circ}C$ .

Answer: $2.5 \text{ kg}$ . $m = q/(c\Delta T) = 1500/(200 \times 3) = 2.5$

Flashcard 39: Find $\Delta T$ if $q=2500 \text{ J}$ , $m=5 \text{ kg}$ , $c=500 \text{ J/kg·K}$ .

Answer: $1^{\circ}C$ . $\Delta T = q/(mc) = 2500/(5 \times 500) = 1$

Flashcard 40: Find the mass if $q=1500 \text{ J}$ , $c=200 \text{ J/kg·K}$ , $\Delta T=3^{\circ}C$ .

Answer: $2.5 \text{ kg}$ . $m = q/(c\Delta T) = 1500/(200 \times 3) = 2.5$

Flashcard 41: Find the specific heat if $q=360 \text{ J}$ , $m=2 \text{ kg}$ , $\Delta T=2^{\circ}C$ .

Answer: $90 \text{ J/kg·K}$ . $c = q/(m\Delta T) = 360/(2 \times 2) = 90$

Flashcard 42: What is the unit of thermal conductivity in SI?

Answer: Watts per meter per Kelvin (W/m·K). Power per length per temperature difference.

Flashcard 43: Calculate $\Delta T$ if $q=500 \text{ J}$ , $m=1 \text{ kg}$ , $c=250 \text{ J/kg·K}$ .

Answer: $2^{\circ}C$ . $\Delta T = q/(mc) = 500/(1 \times 250) = 2$

Flashcard 44: Identify the meaning of $\Delta x$ in thermal conductivity.

Answer: Thickness of the material. Greater thickness reduces heat transfer rate.

Flashcard 45: What is thermal conductivity?

Answer: Measure of a material's ability to conduct heat. Material property for heat conduction efficiency.

Flashcard 46: State the formula for thermal conductivity.

Answer: $q = -kA\frac{\Delta T}{\Delta x}$ . Fourier's Law relates heat flow to material properties.

Flashcard 47: What does $\Delta T$ represent in heat transfer formulas?

Answer: Change in temperature. Final minus initial temperature.

Flashcard 48: What is the unit of thermal conductivity in SI?

Answer: Watts per meter per Kelvin (W/m·K). Power per length per temperature difference.

Flashcard 49: What does $q$ represent in heat equations?

Answer: Heat transfer. Heat energy or heat flow rate.

Flashcard 50: Find the specific heat capacity if $q=500 \text{ J}$ , $m=2 \text{ kg}$ , $\Delta T=5^{\circ}C$ .

Answer: $50 \text{ J/kg·K}$ . $c = q/(m\Delta T) = 500/(2 \times 5) = 50$

Flashcard 51: What does $k$ represent in the thermal conductivity formula?

Answer: Thermal conductivity. Material's intrinsic heat conduction property.

Flashcard 52: Identify the symbol for specific heat capacity.

Answer: $c$ . Lowercase c is standard notation.

Flashcard 53: What is the formula for specific heat capacity?

Answer: $c = \frac{q}{m\Delta T}$ . Rearranged from $q = mc\Delta T$ .

Flashcard 54: What does $\Delta T$ represent in heat transfer formulas?

Answer: Change in temperature. Final minus initial temperature.

Flashcard 55: State the formula for calculating heat transfer.

Answer: $q = mc\Delta T$ . Relates heat to mass, specific heat, and temperature change.

AP Physics 2 Flashcards: Specific Heat And Thermal Conductivity

Specific Heat And Thermal Conductivity

What this deck covers

How to use these flashcards

All flashcards

Flashcard 1: What is the specific heat if q=200 Jq=200 \text{ J}q=200 J, m=4 kgm=4 \text{ kg}m=4 kg, ΔT=2∘C\Delta T=2^{\circ}CΔT=2∘C?

Flashcard 2: State Fourier's Law of Heat Conduction.

Flashcard 3: What does the negative sign in q=−kAΔTΔxq = -kA\frac{\Delta T}{\Delta x}q=−kAΔxΔT​ indicate?

Flashcard 4: What is the specific heat of water?

Flashcard 5: What does the negative sign in q=−kAΔTΔxq = -kA\frac{\Delta T}{\Delta x}q=−kAΔxΔT​ indicate?

Flashcard 6: Find the specific heat capacity if q=500 Jq=500 \text{ J}q=500 J, m=2 kgm=2 \text{ kg}m=2 kg, ΔT=5∘C\Delta T=5^{\circ}CΔT=5∘C.

Flashcard 7: What is the thermal conductivity of copper?

Flashcard 8: What is the role of area AAA in the thermal conductivity equation?

Flashcard 9: What is the thermal conductivity of air?

Flashcard 10: State Fourier's Law of Heat Conduction.

Flashcard 11: Which material typically has higher thermal conductivity: metal or wood?

Flashcard 12: Define specific heat capacity.

Flashcard 13: Find ccc if q=750 Jq=750 \text{ J}q=750 J, m=3 kgm=3 \text{ kg}m=3 kg, ΔT=10∘C\Delta T=10^{\circ}CΔT=10∘C.

Flashcard 14: What is the specific heat if q=200 Jq=200 \text{ J}q=200 J, m=4 kgm=4 \text{ kg}m=4 kg, ΔT=2∘C\Delta T=2^{\circ}CΔT=2∘C?

Flashcard 15: State the formula for thermal conductivity.

Flashcard 16: Define specific heat capacity.

Flashcard 17: What is the thermal conductivity of air?

Flashcard 18: What is the formula for specific heat capacity?

Flashcard 19: What is thermal conductivity?

Flashcard 20: Which material typically has higher thermal conductivity: metal or wood?

Flashcard 21: What is the temperature change if 1000 J1000 \text{ J}1000 J is added to 2 kg2 \text{ kg}2 kg of aluminum (c=900 J/kg\cdotpKc=900 \text{ J/kg·K}c=900 J/kg\cdotpK)?

Flashcard 22: Find ccc if q=750 Jq=750 \text{ J}q=750 J, m=3 kgm=3 \text{ kg}m=3 kg, ΔT=10∘C\Delta T=10^{\circ}\text{C}ΔT=10∘C.

Flashcard 23: Identify the meaning of Δx\Delta xΔx in thermal conductivity.