Question

The volume expansion of a gas under constant pressure is 0.037. Calculate its volume at - 100°C if its volume at 100°C is 685 cm³.

Answer 1

Volume expansion of a gas means increase or decrease in volume per degree rise or fall in temperature of its volume at 0°C. 

V_t = V₀ + 0.0037 × V₀ × t = V₀(1 + 0.0037 t) 

At 100°C, V_100°C = v₀ (1 + 0.0037 × 100) = 685 cm³ (Given) 

Or V₀ = 585/1.37 = 500 cm³ 

At -100°C, V_-100°C = 500[1 + 0.0037 × (-100)] = 315 cm³