What you mean be enthalpy ?

What do you mean by enthalpy? Show that DeltaH= DeltaU + Delta nRT .

What,do you mean by enthalpy of a system? Write two characteristic of it.

What do you mean by enthalpy of fusion? Explain it with example. What is its significance?

What do you mean by the enthalpy of solidification of water at 0^(@)C and 1 atm pressure =- 6.02 " kJ mol"^(-1) ?

a) What do you meant by enthalpy of vapourisation? b) Explain enthalpy of sublimation.

What do you mean by the standard enthalpy of atomisation of chlorine at 25^(@)C=+121kJ*mol^(-1) ?

What do you mean by heat of reaction or enthalpy of reaction? What are the factors on which heat of reaction depends?