When nitrogen gas reacts with hydrogen gas to form ammonia, 92.38 KJ of heat are given off for each mole of nitrogen gas consumed, under constant pressure and standard conditions. What is the value of H degree for the reverse of the reaction shown.?
1 Answer
Mar 31, 2015
The value of
For which
The minus sign signifies that heat is given out to the surroundings i.e. the reaction is exothermic
If we write the reverse reaction:
Then heat must be taken in from the surroundings and the reaction is endothermic.
So we reverse the sign