Heat and Temperature Worksheet

Based on the containers shown, which container is hotter?

• Container A

• Container B

• Both are equally hot

• Neither container is hot

Which of the following best describes specific heat capacity (SHC)?

• The amount of energy required to raise the temperature of a set mass of a substance by 1°C

• The amount of energy required to melt a substance

• The amount of energy required to boil a substance

• The amount of energy required to freeze a substance

Why is it important to know the specific heat capacity when using an immersion heater in a plumbing system?

• To calculate how much heat is needed to raise the water temperature

• To determine the color of the water

• To measure the pressure in the cylinder

• To find the length of the immersion heater

What is the required temperature range for storing water in hot water storage vessels?

• 40ºC to 45ºC

• 50ºC to 55ºC

• 60ºC to 65ºC

• 70ºC to 75ºC

What is the formula used to calculate the volume of water in a cylindrical vessel?

• πr x height

• πr² x height

• 2πr x height

• πd² x height

What is the volume of the cylinder mentioned in the learning material?

• 0.177 m³

• 1.000 m³

• 0.500 m³

• 0.250 m³

Given that 1 m³ of water equals 1,000 kg, explain how you would convert 0.177 m³ of water to kilograms for a heat calculation.

• Multiply 0.177 by 1,000 to get 177 kg

• Divide 0.177 by 1,000 to get 0.000177 kg

• Add 0.177 to 1,000 to get 1,000.177 kg

• Subtract 0.177 from 1,000 to get 999.823 kg

What is the formula used to calculate the power (in kW) required to produce a certain amount of heat energy (in kJ) within one hour?

• kW = kJ / 3,600

• kW = kJ x 3,600

• kW = kJ / 1,000

• kW = kJ x 1,000

Why is the value 3,600 used in the calculation for power in kW?

• Because there are 3,600 seconds in one hour

• Because it is the specific heat capacity of water

• Because it is the volume of water in litres

• Because it is the temperature increase in degrees Celsius

A heating element is used to raise the temperature of water. If the energy required is doubled but the time remains the same, what happens to the required power?

• It doubles

• It halves

• It stays the same

• It is reduced to zero