A rigid container contains 0.46kg of hot saturated vapour at an unknown initial pressure P1. The container is cooled and the temperature drops to 98C. It is found that the contents of the container now ( at 98C ) are a mixture with quality 0.30 . Calculate the amount of energy that was removed from the container, in KJ. Neglect kinetic and potential energy changes. Note that the reported heat transfer must be negative because energy is leaving the container. Your Answer: Answer Hide hint for Question 3 - It is closed system - As the container is rigid, the volume and total mass will stay the same between the initial and final state. - This means that the specific volume of water will stay constant. - Since you are given the quality of the mixture in the final state, find its specific volume. Use that volume to find the pressure and then the energy of the saturated steam you started with. - Once you have the above perform an energy balance to find the removed energy