Answer to Question #117721 in Molecular Physics | Thermodynamics for A

Question

1. A scientist very carefully does mechanical work on a container of liquid sodium. The liquid sodium loses 300 J of energy to its surroundings but gains 250 J of energy overall. How much work did the scientist do?

Answer 1

As the statement in the problem clearly states that 300 J of energy and gains 250 J of energy which means that total energy supplied by scientist was 300+250 J =550 J