An insulated box contains helium atoms

PHYSICS · Single correct · CBSE · Physics · Kinetic Theory · Kinetic Theory

Problem

An insulated box contains 3.0×10233.0\times10^{23} helium atoms, which are cooled by 40 K40\,\text{K}. What is the change in internal energy of the gas? (a) −4.1×102 J-4.1\times10^{2}\,\text{J} (b) +2.5×102 J+2.5\times10^{2}\,\text{J} (c) −2.5×102 J-2.5\times10^{2}\,\text{J} (d) −1.7×102 J-1.7\times10^{2}\,\text{J}

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