A sample of nitrogen gas had a volume of 500.mL,a pressure in its closed container of 740 torr,and a temperature of 25 °C.What was the new volume of the gas when the temperature was changed to 50 °C and the new pressure was 760 torr,if the amount of gas does not change?
A)530 mL
B)450 mL
C)970 mL
D)240 mL
E)400 mL

Question

Quizplus · Accepted Answer

The correct answer is found using the combined gas law: $V_1/T_1*P_1 = V_2/T_2*P_2$. Convert temperatures to Kelvin (25°C = 298K, 50°C = 323K) and solve for $V_2$: $V_2 = V_1 * T_2/T_1 * P_1/P_2 = 500mL * 323K/298K * 740torr/760torr ≈ 530mL$.

A Sample of Nitrogen Gas Had a Volume of 500