Which law of energy states that energy is converted from one form to another

Have you opened your text book this year?

As was mentioned... open your book and read... or be happy working as a dishwasher or cleaning bathrooms the rest of your life.

Here is your answer.
https://upload.wikimedia.org/math/0/3/a/03a5bbeb3db82b980725ced014bf7cd8.png, or equivalently, https://upload.wikimedia.org/math/e/c/5/ec5df0646897e9539a434da2a40f3e94.pngwhere https://upload.wikimedia.org/math/f/1/9/f1994060e727eb06c7301d77e6a990e1.png is the amount of energy (https://en.wikipedia.org/wiki/Energy) added to the system by a heating process, https://upload.wikimedia.org/math/8/e/a/8ea80c760589ddcc2cb1b820ebac91e2.png is the amount of energy lost by the system due to work (https://en.wikipedia.org/wiki/Work_(thermodynamics)) done by the system on its surroundings and https://upload.wikimedia.org/math/e/8/9/e89378ccd33d2d19d2921f9e20224a66.png is the change in the internal energy (https://en.wikipedia.org/wiki/Internal_energy) of the system.