Chapter 18

Temperature Relationships

P,V,TInversely related P↓V↑ or P↑V↓

Directly related T↑V↑ or T↓V↓

Directly related T↑P↑ or T↓P↓

1L

27°C

2L

? °Cheat

327°C

300 K 600 K

“The volume of a quantity of gas, held at constant pressure, varies directly

with the Kelvin temperature.”

Pressure vs. Temperature

• The pressure exerted by a gas is directly related to the Kelvin temperature if the volume is constant.

The type of container will determine what factor changes (volume or pressure) when the temperature is altered.

Why does bread rise when baked? (Hint: CO2 gas is

produced by yeast action).

If you can install one thermostat in a two-story house, should it be placed on the first or second floor if a you are trying to save money on your

heating bills?

Explain why car owners in severe northern climates often add air to

their tires in the winter and release air from them when summer arrives.

225cm3 of gas are collected at 58°C. What volume

would the gas occupy at standard temperature?

186cm3

667cm3 of a gas at 431 K has the temperature changed to 41°C. What is

the new volume of the gas?

486 cm3

Man dies after explosion at party

Man dies after explosion at party• NEW MILFORD, Conn. --Police were trying to determine who

tossed a beer keg into an open fire at an outdoor party early Sunday, causing an explosion that sent shards of shrapnel slicing through a crowd of partygoers, killing one.

• The explosion, which could be heard miles away, killed Sean M. Caselli, 22, of New Milford. Police say seven other people were taken to New Milford and Danbury hospitals.

• Caselli died after being struck by a piece of flying metal in the neck, police said.

• Witnesses told police they saw someone put what appeared to be a quarter-keg of beer into one of the burning barrels just after 3 a.m.

• Robert Greco, who lives in the area, went to the scene after hearing the explosion.

• "It was an unbelievable explosion," Greco told the News-Times of Danbury. "It rattled the street."

An empty keg at 15°C and 425torr is thrown on a fire and explodes when the temperature

reaches 1157°C. What was the internal pressure in the keg when it exploded?

2110 torr

Homework• Worksheet: Temperature Relationships.

• Summarize the Purpose and Procedure of the “Gas Laws” Lab.