The temperature of a specific amount of gas in a sealed container changes from 40.0°C to 80.0°C.If the volume remains constant,the pressure will change from 755 mmHg to ___.
A) 755 mmHg
B) 378 mmHg
C) 1510 mmHg
D) 669 mmHg
E) 851 mmHg

Question

Quizplus · Accepted Answer

The pressure of a gas is directly proportional to its temperature in Kelvin when the volume is constant (Gay-Lussac's Law). To find the final pressure, convert the temperatures to Kelvin and use the formula P1/T1 = P2/T2. Initial temperature = 40.0°C = 313.15 K, final temperature = 80.0°C = 353.15 K. Initial pressure = 755 mmHg. Solving for P2 gives P2 = (755 mmHg) * (353.15 K / 313.15 K) ≈ 851 mmHg.

The Temperature of a Specific Amount of Gas in a Sealed