144) The heat absorbed or rejected by the working substance is given by (where ds = Increase or decrease of entropy, T = Absolute temperature, and dQ = Heat absorbed or rejected)

145) Which of the following gas has the highest calorific value?

146) The oxygen atom is __________ times heavier than the hydrogen atom.

147) When the gas is cooled at constant pressure,

148) As per Charles' law, the volume of a given mass of a perfect gas varies __________ as its absolute temperature, when the absolute pressure remains constant.