When is bond energy equal to bond dissociation energy ?

What is the enthalpy of formation of the most stable form of an element in its standard state?
 

Out of diamond and graphite, which has greater entropy

At what temperature entropy of a substance is zero?

From thermodynamic point of view, to which system the animals and plants belong

Predict the sign of ∆S for the following reaction heat
CaCO₃ (s) ———> CaO(s) + CO₂(g)

State Hess’s law.

What is the enthalpy change for an adiabatic process?

What do you mean by entropy?

Give a relation between entropy change and heat absorbed or evolved for a reversible reaction occurring at temperature T.

What is the condition for spontaneity in terms of free energy change?