Give reasons: a) Neither q nor w is a state function but q + w is state function.

+1 vote
14.2k views

Give reasons:

(a) Neither q nor w is a state function but q + w is state function.

(b) The dissolution of ammonium chloride in water is endothermic still it dissolves in water.

+1 vote
by (128k points)
selected by

q + w = ΔU. As ΔU is a state function, hence q + w is a state function.

On dissolution, entropy increases i.e., ΔS is +ve. If TΔS > ΔH,

then ΔG will be –ve. Hence, the process is spontaneous.