A tank contains 135 moles of the monatomic gas argon at a temperature of 15.3 °C.How much energy must be added to the gas to increase its temperature to 45.0 °C?

Question

Quizplus · Accepted Answer

We can use the formula

Q = nCΔT

where Q is the amount of energy required, n is the number of moles of gas, C is the molar specific heat capacity (which is 3/2 R for a monatomic gas), and ΔT is the change in temperature.

Plugging in the given values, we get:

Q = (135 mol)(3/2 R)(45.0°C - 15.3°C)

Q = (135 mol)(3/2)(8.314 J/mol·K)(29.7 K)

Q = 5.00 × 10⁴ J

Therefore, the best choice is C.

A Tank Contains 135 Moles of the Monatomic Gas Argon