问答题
当压力不是很高时,天然气在绝热膨胀中,压力降低,比体积增大,分子间位能增大,导致天然气温度降低。When the pressure is not very high, in the adiabatic expansion of natural gas, the pressure decreases, the specific volume increases, and the intermolecular potential energy increases, leading to the temperature decrease of natural gas.