A fixed amount of gas at 25.0°C occupies a volume of 10.0 L when the pressure is 629 torr.Use Charles's law to calculate the volume (L)the gas will occupy when the temperature is increased to while maintaining the pressure at 629 torr.
A) 11.1 L
B) 13.4 L
C) 1.98 L
D) 7.47 L
E) 50.4 L

Question

A fixed amount of gas at 25.0°C occupies a volume of 10.0 L when the pressure is 629 torr.Use Charles's law to calculate the volume (L)the gas will occupy when the temperature is increased to  while maintaining the pressure at 629 torr.
A) 11.1 L 
B) 13.4 L 
C) 1.98 L 
D) 7.47 L 
E) 50.4 L

Quizplus · Accepted Answer

According to Charles's law, at constant pressure, the volume of a gas is directly proportional to its temperature in Kelvin. Therefore, V1/T1 = V2/T2, where V1 = 10.0 L, T1 = 25.0°C + 273.15 = 298.15 K, T2 = 110.0°C + 273.15 = 383.15 K, and P = 629 torr. Solving for V2, we get V2 = (V1/T1) x T2 = (10.0/298.15) x 383.15 = 13.4 L. Therefore, the answer is B, 13.4 L.

A Fixed Amount of Gas at 25