Do Now Gases Review

What are the values for STP?

• 0 K and 1 atm
• 0^oC and 1 atm
• 760 K and 1 atm
• 273^oC and 1 atm

Gas pressure is caused by

• gas molecules colliding with surfaces
• gas molecules condensing to a liquid
• gas molecules hitting other gas molecule
• barometers

Which graph represents the relationship between pressure and volume for a sample of an ideal gas at constant temperature?

Hint: Think about this: As volume increases, pressure should...

• 1

• 2

• 3

• 4

As the temperature of a given sample of a gas decreases at constant pressure, the volume of the gas

• decreases

• increases

• remains the same

If I have 5.6 liters of gas in a piston at a pressure of 1.5 atm and compress the gas until its volume is 4.8 L, what will the new pressure inside the piston be?

• 1.8 atm

• 3.27 atm

• 5.4 atm

• 2.55 atm

As volume of the gas in this container increases, pressure will

• decrease.

• remain the same.

• increase.

• I don’t know

A gas fills a balloon at a temperature of 27 ^oC and 1 atm of pressure. What will the pressure of the balloon be if the gas is heated to 127 ^oC? Select the appropriate equation to solve this.

• P1V1 = P2V2
• PV = nRT
• P1/T1 = P2/T2
• V1/T1 = V2/T2

How do you convert Celsius to Kelvin?

• Add 273
• Subtract 273
• You can't convert those
• They are the same thing

When we use the gas equations, our temperature values must be in

• Celsius

• Kelvin

• Fahrenheit

• Any temperature unit

What is 50 °C in Kelvin?

• 223
• 323
• 100
• 50