An Ideal Gas Is Expanded Isothermally from 20 L to 30

Multiple Choice

An ideal gas is expanded isothermally from 20 L to 30 L. During this process, 6 J of energy is expended by the external mechanism that expanded the gas. Which of the following statements is correct?

A) 6 J of energy flow from the gas into the surroundings.
B) 6 J of energy flow from surroundings into the gas.
C) No energy flows into or from the gas since this process is isothermal.
D) None of the above statements is correct.