College Chemistry Quiz
20 questions · no time limit
0:00
THERMOCHEMISTRY (CALORIMETRY & HESS'S LAW)
Question 1 of 20
No time limit
Current
Answered
Flagged
Not seen
A chemist wants to determine the enthalpy of formation of C2H4(g)C_2H_4(g) using the following data: ΔHf∘[CO2(g)]=−393.5\Delta H_f^\circ[CO_2(g)] = -393.5 kJ/mol, ΔHf∘[H2O(l)]=−285.8\Delta H_f^\circ[H_2O(l)] = -285.8 kJ/mol, and the combustion of ethylene: C2H4(g)+3O2(g)→2CO2(g)+2H2O(l)C_2H_4(g) + 3O_2(g) \rightarrow 2CO_2(g) + 2H_2O(l) has ΔHcombustion∘=−1411.2\Delta H_{combustion}^\circ = -1411.2 kJ/mol. What is ΔHf∘\Delta H_f^\circ for C2H4(g)C_2H_4(g)?
YOUR PROGRESS
20
QUESTIONS
Ready when you are
Answer in any order. Your progress shows here as you go.
QUESTIONS
KEYBOARD
Pick an answer ABCDE
Next question ↵→
Previous ←
Flag for review F
Answers save as you go · flagged questions come back at the end