Exercise 2 | Properties of Gases
A balloon with helium (g) has volume of 1.40 L at T = 25.0°C.
Assuming constant pressure, what volume will the balloon occupy, if it is placed in the freezer and cooled to -22.0°C?
Situation 1: V1 = 1.40 L and T1 = 25.0°C = 298 K
Situation 2: T2 = -22.0°C = 251 K
At constant pressure, V and T are directly proportional:
V1 / T1 = V2 / T2 ⇒ V2 =
V2 = = 1.18 L