EASY
12th Maharashtra Board
IMPORTANT
Earn 100

For the reaction:
N2O4(g)2NO2(g)

H°=+57.24 kJ, S°=175.8 JK-1 
At what temperature the reaction will be spontaneous?

Important Questions on Chemical Thermodynamics and Energetics

HARD
12th Maharashtra Board
IMPORTANT
State and explain Hess’s law of constant heat summation.
HARD
12th Maharashtra Board
IMPORTANT

Standard enthalpy of combustion
Calculate the enthalpy change for the reaction:
N2g+3H2g2NH3g
The bond enthalpies are:

Bond NN H-H N-H
H° kJ mol-1 946 435 389