Subject chemistry

NAME: DATE: STRAND AND SECTION: GROUP NUMBER: ACTIVITY NUMBER 02 The First Law of Thermodynamics DIRECTION: Solve the following problems and show your complete solution. 1. A system absorbs 6457 joules of heat after the surroundings performed a work of 4356 joules. How much does its internal energy change in kilo-Joules? 2. A washing machine performs a work of 567 joules onto the system and lose 623 joules of heat. If 1 joule is equivalent to 0.24 calorie, what will be the internal energy change in calories? 3. An air-conditioner released 35 kilojoules of heat after doing 24 kilojoules of work onto surroundings. What is the internal energy change in joules