Question

A gas occupies 3L at 32 C and 1atm pressure. What volume will it occupy if the temperature is changed to 18. C , the pressure remaining unchanged?

Answer 1

Explanation:

Use Charles law that says that if the pressure is constant, then V1/T1 = V2/T2 and temperature must be in Kelvin

V1 is 3L

V2 is unknown

T1 is 273 + 32 = 305 Kelvin

T2 is 273 + 18 = 291 kelvin

so 3/305 = V2/291

V2 is 291*3/305 = 2.86 L approx

Answer 2

Answer:

volume of gas is directly proportional to temperature , if pressure remains constant

Explanation:

volume of gas is directly prop. to temp

using equation

V1/T1 = V2/T2

since T = 32c = 32+273= 305

3/305 = V2 / 291

V2 = 2.21 litre