3
QuizMultiple Choice
Heat
Question 3 • *25-26 KCS18 Chemistry IC
Which reaction is exothermic?
Answer
A
CH4 + 2O2 CO2 + 2H2O + 891 kJ
B
NH4NO3 + H2O + 25 kJ NH4+(aq) + NO3-(aq)
C
2H2O + 286 kJ 2H2 + O2
D
N2 + O2 + 181 kJ 2NO
Question 3 • *25-26 KCS18 Chemistry IC