Molar Heat Capacities: an Ideal Monatomic Gas Cools from 455

question 19

Multiple Choice

Molar heat capacities: An ideal monatomic gas cools from 455.0 K to 405.0 K at constant volume as 831 J of energy is removed from it. How many moles of gas are in the sample? The ideal gas constant is R = 8.314 J/mol ∙ K.

• A) 2.50 mol
• B) 2.15 mol
• C) 1.50 mol
• D) 1.33 mol
• E) 0.725 mol

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