Generating a problem that addresses multiple course learning objectives can be a challenging, but worthwhile exercise for a professor. These types of problems are particularly useful late in a course to help students tie together seemingly disparate concepts to solve an integrated problem that requires them to review concepts mastered throughout the course. Relating the problem to something that the student experiences on a day-to-day basis enhances the utility of the problem. This submission provides an overview of one such problem, an energy balance for an e-cigarette device. The submission includes a problem statement, key parameters from device measurement and literature surveys, and a worked out solution. This problem is intended for use in the Mass and Energy Balances course typically taught to sophomore chemical engineers. It reinforces key topic areas and integrates mass and energy balances with vapor-liquid equilibrium (VLE) to demonstrate how a real world problem can be tackled using appropriate assumptions.