A cylinder of gas originally at 28.0°C and 1.00 atm of pressure is heated to 112.0°C. What is the new pressure?

Question

Quizplus · Accepted Answer

The pressure of a gas is directly proportional to its temperature in Kelvin when the volume and the amount of gas are held constant (Gay-Lussac's Law). To find the new pressure, convert temperatures to Kelvin and use the formula P1/T1 = P2/T2. Initial temperature (T1) = 28.0°C = 301K, final temperature (T2) = 112.0°C = 385K. P1 = 1.00 atm. Solving for P2 gives P2 = P1 * (T2/T1) = 1.00 atm * (385K / 301K) = 1.28 atm.

A Cylinder of Gas Originally at 28