Which of these expressions are correct variations of the Combined Gas Law?

both

Both: T1 = T2 (P1V1/P2V2)

V2 = V1 (T2/T1) (P1/P2)

Explanation:

To answer this question, we are going to take the expressions in question as;

i) T1 = T2 (P1V1/P2V2)

ii) V2 = V1 (T2/T1) (P1/P2)

We are required to determine whether the expressions are correct variation of the Combined Gas Law.

Combined gas law puts together the Boyle's law and the Charles's law. According to Boyle's law, the volume of a fixed mass of a gas is directly proportional to the absolute temperature and inversely proportional to the pressure. Therefore; V α T/P

Hence;

P₁V₁/T₁=P₂V₂/T₂

From the equation, we can rearrange it to get the expressions;

T1 = T2 (P1V1/P2V2)

V2 = V1 (T2/T1) (P1/P2)

Thus, both expressions are correct variations of the combined gas law.