What is the name of the variable that tells you how much heat energy is required to change the state of \(1 kg\) of a substance?
Specific latent heat
Specific heat capacity
Capacity of materials to withstand heat
What happens to the temperature of an object when it changes from a solid to a liquid?
It increases
It decreases
It remains the same
What happens to the temperature of an object when it changes from a liquid to a gas?
Why does the temperature of ice remain at \(0°C\) when it is melting?
Heat energy is moving the particles more quickly
Heat energy is making the particles expand
Heat energy is being used to alter the chemical bonds between the particles
What is the energy from a Bunsen burner doing at the point when water is boiling in a beaker?
It is increasing the temperature of the water
Converting the water into steam
Turning into kinetic energy
The energy required to change \(1.5 kg\) of ice at \(0°C kg\) into water is:
(\(I_{f} = 3.34 \times 105 Jkg^{-1} : L_{v} = 2.26 \times 106 Jkg^{-1}\))
\[5.0 \times 10^{5} J\]
\[3.4 \times 10^{6} J\]
\[3.4 \times 10^{5} J\]
How much gold (at its melting point) would melt when given \(8500 J\) of energy?
\[l_{f} = 6.7 \times 10^{5}\]
\[0.013 kg\]
\[1.3 kg\]
\[79 kg\]
Why is a burn from steam at \(100°C\) more harmful than a burn from water at \(100°C\)?
More energy is released as steam has great specific heat capacity
More energy is released as steam has greater density
More energy is released when steam condenses to water
If someone gets wet in cold weather, why will they feel colder?
The water is colder than the air
The water will evaporate from their skin and take heat from their body to do so
Water is a good conductor
Why do tumble dryers require a lot of electrical energy to operate?
Water takes a long time to evaporate
Water has a high specific latent heat value and a lot of energy is required to evaporate the water
The continual turning of the drum needs lots of energy