The volume of a gas at 20°C is 100cm3 at normal pressure. If it is heated to 100°C, its volume becomes 125cm3 at the same pressure, then volume coefficients of the gas (at normal pressure) is?

In thermodynamics, absorption and emission are two of the four main methods of heat transfer:
Absorption: The spectra produced when electrons of an atom absorb energy
Emission: The spectra produced when electrons release energy