Answer to Question #267174 in General Chemistry for Zai

Question

A sample of dry air, with a volume of 125 ml and a temperature of 53°C, is heated at constant

pressure to 95°C. What is the new volume in milliliters, of the sample?

Answer 1

General gas law:

(P₁*V₁) / T₁ =(P₂*V₂)/ T₂

Since p = const: V₁/T₁ = V₂/T₂

So, step 1. Convert the temperatures to Kelvin. {K=C+273}

T₁ = 53 + 273 = 326 K

T₂ = 95 + 273 = 368 K

(125 mL / 326 K) = (V₂ mL / 368 K)

V₂ = 141mL