The minimum average kinetic energy of the molecules in a substance occurs at which temperature?

Water in the ice maker of a refrigerator has a mass of 0.4 kg and temperature of 22^oC. What is the temperature of the water after 33 600 J of energy has been removed from it?

(Specific heat capacity of water = 4200 J kg^{-1 o}C^-1)

Two cups contain coffee at 85^oC and milk at 35^oC respectively. The specific heat capacity of milk is 1.5 times the specific heat capacity of coffee. The mass of coffee is twice the mass of milk. If the drinks are mixed together, what is the final temperature of the mixture?

Diagram above shows a container of Baskin Robbin ice cream bought at the Aeon supermarket. The purchase of that ice cream comes together with few cubes of dry ice. Name the process of dry ice changing from solid to gas.

If the specific heat of water is 4,186 J/kg∙°C, how much heat is required to increase the temperature of 1.2 kg of water from 23 °C to 39 °C?

Diagram 16 shows the heating curve of a substance.

Which statement is correct between point P and point Q?

Diagram 17 shows a 5.0 kg metal cylinder with specific heat capacity of 450 Jkg^–1oC^–1

is heated using a heater of power 1 kW. The heater is switched on for 10 seconds.

What is the rise in temperature of the cylinder?

If the same amount of heat is supplied to water and paraffin of the same mass, the temperature rise of paraffin is higher than water. This is due to

Which graph shows the relationship between the volume, V, and the absolute temperature, T, for a fixed mass of gas at constant pressure?

The graph shows the heating curve of a substance.

At which stage is the substance in the liquid and gaseous state at the same time?

The diagrams show four types of metal block of the same mass being heated using the same quantity of heat for 10 minutes.

Which metal block shows the highest increase in the temperature?

Diagram 13 shows the heating curve of a substance.

Why is the temperature at BC constant even though the heat is supplied continuously?

24 000 J of heat is used to increase the temperature of 0.8 kg metal block from 25°C to 55°C.

What is the specific heat capacity of the metal block?

Diagram 13 shows a gas trapped inside a glass tube at the temperature 27^oC.

What is the temperature if the length of the gas trapped increases to 12 cm?

Which of the following graphs shows the relationship between the pressure, P, and the volume, V, of a gas according to Boyle's law?

Which graph shows the correct relationship between the volume and the temperature of

gas in Charles's Law?

Which of the following graphs shows the relationship between the pressure, P, and the volume, V, of a gas according to Boyle's law?

Diagram 13 shows two beakers with different volume of liquid X and same initial temperature. Both beakers are then heated with the same amount of heat energy.

Which comparison is correct about the reading of thermometer P and thermometer Q?

Diagram 12 shows 1kg of liquid being heated using an electric heater for 10 minutes.

The temperature of the liquid is increased faster by

Two metal blocks of the same mass, P and Q are heated simultaneously with identical heaters. After 15 minutes, the temperature of metal block Q is higher than the temperature of metal block P.

Which comparison is correct?

Butene gas leakage happens in a laboratory preparation room.

A teacher in the adjacent laboratory smells the odour even though no wind is blowing.

This phenomenon happens because of

Diagram below shows a cup of hot coffee.

What happens when the coffee and the cup are in thermal equilibrium?

The specific heat capacity of aluminium is 900 J kg^-1°C^-1.

Which statement explains the specific heat capacity of aluminium correctly?

Diagram below shows the heating curve of a sample of naphthalene.

Naphthalene starts to melt at the time

Diagram 16 shows the heating curve of a substance.

Which statement is correct between point P and point Q?

Diagram below shows the pressure-temperature graph for a fixed mass of gas at constant volume.

Which statement is correct about the condition of the gas?

Diagram A shows a dented ping-pong ball.

Diagram B shows the condition of the ball after being placed in hot water.

Which of the following is correct about the mass of the air and the kinetic energy of the air molecules inside the ping-pong hall when the ball is placed in hot water?

Diagram below shows a lead block, an iron block and an aluminium block. All the blocks have the same mass and heated with same amount of heat energy in 15 minutes. The specific heat capacity, c, of each metal is different.

Which statement is correct at the end of the 15 minutes?

A lead ball with the specific heat capacity of 130 Jkg^-1oC^-1 was released from a high building. By assuming all the potential energy converts to heat energy, calculate the change in temperature

Diagram 13 shows a process of changing state from solid to gas.

Which process needs higher latent heat to be absorbed?

Diagram 11 shows a graph of temperature, T, against time, t, for three blocks X, Y and Z. Theblocks are of same mass and are heated at a same rate.

Which comparison between specific heat capacity X, Y and Z is correct?

Diagram 12 shows a metal cylinder of mass 5 kg and specific heat capacity 400 J kg^{-1 o}C^-1 is heated with a heater of power 800 W.

What is the rise of temperature of the cylinder if the heater is switched on for 1 minute?

Diagram 10 shows a metal container, water and copper block are in thermal equilibrium.

Which statement is correct?

Diagram 16 shows an air-tight cylinder with a piston. A force, F is applied onto the piston to produce pressure.

Which graph represents the relationship between pressure (P) and distance of compression, /?

Diagram 17 shows the pressure of a car tyre is 200 kPa at temperature 30^oC.

After a long journey, the temperature of the tyre is increased to 60 oC.

What is the new pressure?

(Volume of the air in the tyre does not change)

Diagram 14 shows a cooking pan made of different material.

Which specific heat capacity value of material is suitable to make the handle, the body and the base of the cooking pan?