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Heat and Thermodynamics question

2018 · Shift 2 · Q47
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Heat and Thermodynamics question

2018 · Shift 2 · Q47

JEE AdvancedPhysicsHeat and ThermodynamicsNumerical+3 / −1
One mole of a monatomic ideal gas undergoes an adiabatic expansion in which its volume becomes eight times its initial value. If the initial temperature of the gas is 100 K100\,K100K and the universal gas constant R=8.0J mol−1K−1,R=8.0J\,mo{l^{ - 1}}{K^{ - 1}},R=8.0Jmol−1K−1, the decrease in its internal energy, in Joule, is ‾\underline{\hspace{2cm}}​.
Numerical answer
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