WorksheetsHeat
Total questions: 16
Worksheet time: 50mins
Q = m S ∆T
Q = m S
Q = ½ m v
m = Q S
There are four cups of hot cocoa. The cup sizes are shown. The temperature of the cocoa in each cup is 55 degrees celsius. Which cup has the MOST thermal energy?
Large cup (Trenta)
Small cup (Tall)
Venti
All three are the same temperature so they have same thermal energy
Q m = ∆T S
Q / (m S) = ∆T
Q m / S = ∆T
Which of the following statements is correct?
The unit of heat capacity is J kg-1 °C-1.
Specific heat capacity measures the temperature variations when 1J of energy is absorbed.
The unit of specific heat capacity is J kg-1 K-1.
Specific heat capacity equals to the heat content of an object.
When an electric heater is supplied with an electric power of 2.0 kW to heat 4.0 kg of water for 1 minute, calculate the increase in temperature of the water. Assume that the specific heat capacity of water is 4200 J kg-1 0C-1 and there is no heat loss to the surroundings.
3.050C
7.10C
140C
300C
Given that the specific latent heat of fusion of a sample is 550 kJ kg-1. Which of the following is correct?
The mass of this sample is 1 kg.
The energy needed to increase the temperature of 1 kg of this sample in solid state through 1oC is 550 kJ.
The energy needed to increase the temperature of 1 kg of this sample in liquid state through 1oC is 550 kJ.
The energy needed to change 1 kg of the material from solid state to liquid state is 550 kJ.
11340 J
3,840 J
