- #1
Tsunnnami
- 11
- 0
So it is stated that exothermic reactions are the ones where the heat of reaction is positive and endothermic reactions are the ones where the heat of reaction is negative.
My question is: why is this so, when in the 1st law of thermodynamics, where
ΔU=Q+W it is stated that Q is positive if the system absorbs heat from the environment and Q is negative if the system releases heat to the environment ?
My question is: why is this so, when in the 1st law of thermodynamics, where
ΔU=Q+W it is stated that Q is positive if the system absorbs heat from the environment and Q is negative if the system releases heat to the environment ?