Question

What volume of gas would result if 245 mL of neon gas is compressed from 1.34 atm to 2.67 atm at constant temperature?

WebAssign will check your answer for the correct number of significant figures. mL

A favorite demonstration in introductory chemistry is to illustrate how the volume of a gas is affected by temperature by blowing up a balloon at room temperature and then placing the balloon into a container of dry ice or liquid nitrogen (both of which are very cold). Suppose a balloon containing 1.13 L of air at 25.2°C is placed into a flask containing liquid nitrogen until it's temperature reaches -78.5°C. What will the volume of the sample become (at constant pressure)?

WebAssign will check your answer for the correct number of significant figures. “answer in L”

Answer 1

Ans 1 :

Volume of gas is inversely related to its pressure. It is given as :

p1V1 = p2V2

p1 = 1.34 atm

p2 = 2.67 atm

V1 = 245 mL

putting values :

1.34 atm x 245 mL = 2.67 atm x V2

V2 = 123 mL

Ans 2 :

Volume of gas is directly related to temperature . It is given as :

V1 T2 = V2 T1

V1 = 1.13 L

T1 = 25.2^oC = 298.35 K

T2 = -78.5^oC = 194.65 K

putting values :

1.13 L x 194.65 K = V2 x 298.35 K

V2 = 0.737 L