Answer to Question #323629 in General Chemistry for micheal

Question

A helium filled balloon has a volume of 2.75 dm3 at 20.0°C. The volume of the balloon changes to 2.07 dm3 when placed outside on a cold day. What is the temperature outside in °C?

Answer 1

V₁/T₁ = V₂/T₂

2.75 L / (20.0 + 273.15) K = 2.07 L / T₂

T₂ = 220.66 K = (220.66 - 273.15)°C = -52.5°C