A student heats a solid substance in a beaker and measures its temperature.
Name the process when a solid changes into a liquid.
Describe the changes in the arrangement and movement of particles when a solid becomes a liquid.
The student then collects the resulting substance as a gas in a flask. She seals the flask so that the volume of the gas remains constant, and then heats it.
Before being heated, the gas is at a temperature of 280 K and a pressure of 120 kPa. Calculate the pressure of the gas when the temperature is increased to 350 K.
Complete the graph to show how the average kinetic energy of the gas molecules changes as the temperature of the gas increases.
