Temperature, Kinetic Theory November 28, 2005

It turns out that – 40°C is the same temperature as – 40°F. Is there a temperature at which the Kelvin and Celsius scales agree? 1.yes, at 0 °C 2.yes, at -273 °C 3.yes, at 0 K 4.no

Which weighs more – a mole of nitrogen (N 2 ) gas or a mole of oxygen (O 2 ) gas? 1.Oxygen 2.Nitrogen 3.Both the same

Two identical cylinders at the same temperature contain the same gas. If A contains three times as much gas as B, which cylinder has the higher pressure? 1.cylinder A 2.cylinder B 3. both the same 4.depends on temperature, T

Two identical cylinders at the same pressure contain the same gas. If A contains three times as much gas as B, which cylinder has the higher temperature? 1.cylinder A 2.cylinder B 3.both the same 4.depends on pressure, P

Answers 1.4. No since they are offset by 273 for all temperatures oxygen is 16g/mol where nitrogen is 14g/mol 3.1. A has 3 times the pressure, PV=nRT, all else being equal, if n is 3times bigger, P must also be 3times bigger for the equation to hold B must be at a higher temp. Again, PV=nRT, if PV=const, then the only way to fit more gas (higher n) is to lower temp.