Which of the following statements is (are) correct?

Question

I. The volume of a gas is inversely proportional to its pressure.

II. The pressure of a gas is inversely proportional to its absolute temperature

III. The volume of a gas is directly proportional to its absolute temperature 

 

I only 

 

II only 

 

III only 

 

I and II

 

I and III 

 

II and III 

 

I chose I and III not sure 

Answer 1

Hello Karen

 

Your answer is correct.  Great work!

 

Answer choice I is related to Boyle's Law; pressure and volume are inversely related:  P ∝ 1 / V or  V ∝ 1 / P

 

Answer choice II is related to Gay-Lusaac's Law; pressure and temperature are DIRECTLY related, therefore, this answer choice is incorrect: P ∝ T

 

Answer choice III is related to Charles's Law;   V ∝ T