A sample of an ideal gas is in a fixed volume container at pressure P-by heating the gas, the average speed of molecules in the gas triples. What is the new pressure of the gas?
A) 3P
B) P/9
C) depends on the number density of the gas
D) P/3
E) 9P

Question

Quizplus · Accepted Answer

The pressure of an ideal gas is directly proportional to the square of the average speed of its molecules. If the average speed triples, the pressure increases by a factor of $3^2 = 9$, making the new pressure $9P$.

A Sample of an Ideal Gas Is in a Fixed