Gas Temperature Recap

What's the best reason for why there is a limit to how cold something can be?

• You can't get colder than deep space

• Thermometers can't be made to go below a certain temperature

• There is a limit to how fast particles can move (speed of light)

• Particles can't have less than zero kinetic energy

The coldest temperature every recorded on Earth was -89 °C at Vostok Research Station in Antarctica. What is this temperature in Kelvin?

• 184 K

• -362 K

• -184 K

• 362 K

In July 2019, a weather station south of Beijiing recorded a temperature of just under 43°C - its highest since records began. What is this temperature in Kelvin?

• 230 K

• 316 K

• 416 K

• 86 K

The temperature of a gas is proportional to...

• the kinetic energy of all the particles added together

• the average kinetic energy of each particle

• the total kinetic energy and potential energy of all the particles

• the specific heat capacity of the gas

Doubling the kinetic energy of each particle in the gas...

• Halves the temperature of the gas

• Doesn't change the temperature of the gas

• Doubles the temperature of the gas

• Halves the speed of the particles

Doubling the speed of each particle...

• Doubles the temperature of the gas

• Halves the temperature of the gas

• Makes the temperature of the gas four times smaller

• Makes the temperature of the gas four times bigger

What is absolute zero in °C? (three significant figures please)

• -273°C

• -270°C

• -273.15°C

• 0°C

The specific heat capacity of water is 4180 J/kg°C (to three significant figures). What is the specific heat capacity of water in J/kg K?

• 3907J/kg K

• 4453 J/kg K

• 4180 J/kg K

Your room feels really cold, and you want to warm it up. You can increase the temperature by 1°C or by 1 K. Which would cause the greatest increase in temperature?

• 1°C

• 1 K

• They're the same increase

Heating up a gas...

• Makes the potential energy increase

• Breaks the bonds between the particles

• Increases the speed of the particles

• Decreases the gas's Kelvin temperature