What you’ll learn2 learning objectivesChoose one objective for a focused lesson, or study the complete topic.16.2.1W = p∆V for the work done when the volume of a gas changes at constant• recall and use W = p∆V for the work done when the volume of a gas changes at constant pressure and understand the difference between the work done by the gas and the work done on the gasSyllabus objective16.2.2The first law of thermodynamics ∆U = q + W expressed• recall and use the first law of thermodynamics ∆U = q + W expressed in terms of the increase in internal energy, the heating of the system (energy transferred to the system by heating) and the work done on the systemSyllabus objective