Q1. An ideal gas is expanded isothermally from 20 L to 30 L. throughout 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 surroundings into the gas.
b. No energy flows into or from the gas because this process is isothermal.
c. None of the above statements is correct.
d. 6 J of energy flow from the gas into surroundings.
Q2. Which of the planets fits the following description: "a solid, cool surface, with occasional dust clouds and a thin CO2 atmosphere"?