What is heat capacity? Explain.

What is heat? Explain.

A mono atomic ideal gas undergoes a process in which the ratio of P to V at any instant is constant and equal to 1. What is molar heat capacity of the gas.

P-V diagram of a diatomic gas is a straight line passing through origin. What is the molar heat capacity of the gas in the process

The ratio of P to V at any instant is constant and is equal to 1. for a monoatomic ideal gas under going a process. What is the molar heat capacity of the gas

Ideal monoatomic gas is taken through a process dQ = 2dU. What is the molar heat capacity for the process ? (where dQ is heat supplied and dU is change in internal energy)

What is buffer capacity ? Write its significance.