Question

chemistry 20
final exam 2025
name: ebtesam
gases

1. the volume of a fixed mass of gas increases from 10ml to 30ml, while remaining

at a constant pressure. if the original temperature of the gas was t kelvin, then
the final temperature of the gas will be
□ 1/20 t
□ 3t
□ 1/3 t
□ 20 t

Explanation:

Step1: Apply Charles's Law

Charles's Law states that \(V_1/T_1 = V_2/T_2\) for a gas at constant pressure. Here, \(V_1 = 10mL\), \(T_1=T\), \(V_2 = 30mL\).

Step2: Solve for \(T_2\)

Substitute the values into the formula: \(\frac{10}{T}=\frac{30}{T_2}\). Cross - multiply gives \(10T_2=30T\). Then \(T_2 = 3T\).

Answer:

3T