Three gases, one consisting of monatomic molecules, one consisting of diatomic molecules, and one consisting of polyatomic molecules, are in thermal equilibrium with each other and remain in thermal equilibrium as the temperature is raised. All have the same number of molecules. The gases with the least and greatest change in internal energy are respectively:
A. polyatomic, monatomic
B. monatomic, polyatomic
C. diatomic, monatomic
D. polyatomic, diatomic
E. monatomic, diatomic
Answer: B. monatomic, polyatomic
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