First slide

Enthalpy and enthalpy change

Question

For exothermic and endothermic reactions $∆ H$ will be respectively

Easy

A

positive, negative
B

negative, positive
C

positive, positive
D

negative, negative

Solution

$∆$ H is negative for exothermic reaction which evolve heat during the reaction and $∆$ H is positive for endothermic reactions which absorb heat from the surroundings.

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