Which expression gives the change in internal energy of an ideal monatomic gas when…

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Thermodynamics · Thermodynamics

Problem

Which expression gives the change in internal energy

\Delta U

of an ideal monatomic gas when its temperature changes from

T_1

T_2

? (a)

\displaystyle \Delta U=\tfrac{5}{2}\,nR\,(T_2-T_1)

(b)

\displaystyle \Delta U=\tfrac{3}{2}\,nR\,(T_2-T_1)

(c)

\displaystyle \Delta U=nR\,(T_2-T_1)

(d)

\displaystyle \Delta U=\tfrac{5}{3}\,nR\,(T_2-T_1)