Give reasons `:` (a) Neither q nor w is a state function but`q+w` is a state function. (b) The dissociation of ammonium chloride in water is endothermic still it dissolved in water. (c ) A real crystal has more entropy than an ideal crystal.

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

1.	Give reasons `:` (a) Neither q nor w is a state function but`q+w` is a state function. (b) The dissociation of ammonium chloride in water is endothermic still it dissolved in water. (c ) A real crystal has more entropy than an ideal crystal.
Answer» (a) `q+w = DeltaU` . As `DeltaU` is a state function,hence`q+w` is a state function. (b) On dissolution,entropy increases , i.e.,`DeltaS` is`+ve` . Though `DeltaH` is`+ve` but if `T DeltaS gt DeltaH ` , then according to the equation ,`DeltaG = DeltaH -T DeltaS , DeltaG` will be -ve. Hence,the process is spontaneous. (c ) A real crystal has some disorder due to presence of defects whereas ideal crystal has no disorder. Hence, a real crystal has more entropy than ideal crystal.

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Give reasons `:` (a) Neither q nor w is a state function but`q+w` is a state function. (b) The dissociation of ammonium chloride in water is endothermic still it dissolved in water. (c ) A real crystal has more entropy than an ideal crystal.

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