A sample of a gas originally at 29 °C and 1.25 atm pressure in a 3.0 L container is allowed to contract until the volume is 2.2 L and the temperature is 11 °C.The final pressure of the gas is ________ atm.
A)2.9
B)2.8
C)1.6
D)2.1
E)0.38

Question

Quizplus · Accepted Answer

Using the combined gas law: (P1 * V1) / T1 = (P2 * V2) / T2, where temperatures are in Kelvin. Convert temperatures: 29°C = 302K, 11°C = 284K. Solve for P2: P2 = (1.25 atm * 3.0 L * 284 K) / (2.2 L * 302 K) = 1.6 atm.

A Sample of a Gas Originally at 29 °C and 1.25