A 750-mL sample of hydrogen exerts a pressure of 822 torr at 325 K. What pressure does it exert if the temperature is raised to 475 K at constant volume? A)188 torr B)562 torr C)1.11 × 10 ³ torr D)1.20 × 10 ³ torr E)1.90 × 10 ³ torr

Question

Quizplus · Accepted Answer

We can use the combined gas law to solve for the new pressure:

(P1/T1) = (P2/T2)

where P1 = 822 torr, T1 = 325 K, and T2 = 475 K. We want to solve for P2.

(P2) = (P1/T1) x T2
(P2) = (822 torr/325 K) x 475 K
(P2) = 2082.46 torr

Rounding to the correct number of significant figures gives us:

P2 = 1.20 × 10^3 torr, which is choice D.

A 750-ML Sample of Hydrogen Exerts a Pressure of 822