CHEM 35

General Chemistry

Quiz #4

October 6, 2000

Take-home problem set

Name:            Largo, Key

1. Boyle investigated the effects of pressure changes on the volume of a gas (at a constant temperature). Indicate, either graphically or by an equation, the relationship that we now know as Boyle's Law.

Boyle found that the product of the pressure and the volume of a gas was constant: P x V = constant.

Graphically, this means that a plot of Pressure as a function of 1/V is a straight line having a slope equal to the constant.

2. One mole of N₂ gas at 1.00 atm is heated from 0 ^oC (273.15 K) to 100 ^oC (373.15 K). If the gas occupied 22.41 L at 0 ^oC, what volume does it occupy at 100 ^oC (still at 1.00 atm of pressure)?

P₁V₁ = P₂V₂

T₁ T₂

Solving for V₂: V₂ = P₁V₁T₂

T₁P₂

= (1.00 atm)(22.41 L)(373.15 K)

(273.15 K)(1.00 atm)

= 30.6143 L

= 30.6 L