Question

chemistry 20
final exam 2025
name: ebiesari
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
3 t
1/3 t
20 t

Explanation:

Step1: Recall Charles's Law

Charles's Law is $V_1/T_1 = V_2/T_2$.

Step2: Substitute the given values

Given $V_1 = 10mL$, $V_2 = 30mL$, $T_1 = T$.
So, $10/T = 30/T_2$.

Step3: Solve for $T_2$

Cross - multiply: $10T_2 = 30T$.
Then $T_2=\frac{30T}{10}=3T$.

Answer:

3T