First slide

Enthalpy of Phase transition

Question

A) Enthalpy of atomization
B) Enthalpy of fusion
C) Enthalpy of solution
D) Enthalpy of condensation
E) Enthalpy of formation
From the above list identify how many always have the Enthalpy change to be positive

Moderate

A

1
B

2
C

3
D

4

Solution

${ΔH}_{a tomiza tion} & {ΔH}_{fusion} . . . . always + ve$
${ΔH}_{Solution}, {ΔH}_{forma tion} . . . . can be +ve (or) - ve$
${ΔH}_{condensa tion} . . . . always - ve$

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