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?

What is an adiabatic process?

 What is free energy in terms of thermodynamics?

Define extensive properties.