CHEM 120 Lecture Notes - Lecture 3: Gas Constant, Ideal Gas Law, Ideal Gas

• School: McGill University
• Department: Chemistry
• Course: CHEM 120
• Professor: Laura Pavelka

Document Summary

As pressure increases volume decreases, vice versa. At constant pressure and moles volume absolute temperature. All gases reach 0 volume at 0 k (-273. 15 c) Constant is the universal gas constant r . In all cases 1 mol of ideal gas = 22. 7l. Constant r at stp=0. 083145 barl mol-1 k-1. You can use any iteration in examples including boyle s law, charles" law etc. A 43. 8 l oxygen cylinder contains 88. 5g o2 at 21 c. Convert to torr = 1. 53 * 760 =1160 torr. You can rearrange the equation to solve for the other variable. When a gas is compressed: the molecules are confined in a smaller volume so density increases. Gases react in volumes that are proportional to small whole numbers. Example problem: potassium superoxide used to remove co2 and release o2. 4 ko2(s) + 2 co2(g) 2 k2co3(s) + 3 o2(g)