Question

Explain the sign convention used for ∆H.​

Answer 1

Explanation:

ΔH CAN BE NEGATIVE OR POSITIVE AS FOLLOWS:

1. If work is done on the system means when a system consumes energy from surroundings to carry out a reaction, the process is said to be endothermic. As it gains extra energy from surroundings, ΔH is Positive .
2. if work is done by the system ;when it releases energy in the surroundings, the reaction is endothermic . As it releases out the energy, ΔH is Negative.

HOPE THIS HELPS!!