A sample of ammonia gas at 65.5°C and 524 torr has a volume of 15.31 L. What is its volume when the temperature is −15.8°C and its pressure is 524 torr?
A)3.69 L
B)11.6 L
C)20.2 L
D)63.5 L
E)Not possible, since the volume would have to be negative

Question

Quizplus · Accepted Answer

Since the pressure and the amount of gas remain constant, we can use Charles's Law (V1/T1 = V2/T2) to find the new volume. Convert temperatures to Kelvin: T1 = 65.5°C + 273.15 = 338.65 K, T2 = -15.8°C + 273.15 = 257.35 K. Solve for V2: V2 = V1 * (T2/T1) = 15.31 L * (257.35 K / 338.65 K) ≈ 11.6 L.

A Sample of Ammonia Gas at 65