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Calculate the change in internal energy of `3 .0` mol of helium gas when its temperature is increased by `2. 0 K`. |
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Answer» Correct Answer - D Helium is a monatomic gas. Internal energy of (n) moles of the gas is `U = 3/2 nRT` `:. Delta U = 3/2 nR (Delta T)` Substituting the values, `Delta U = (3/2)(3) (8.31)(2.0)` = `74.8 J`. |
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