If two substances of equal mass are supplied the same amount of thermal energy and their final temperatures are different, you can assume that they have

different abilities to conduct heat

When water at 100 Celsius is cooled to 50 Celsius, which of the following is true?

The kinetic energy of the water molecules is being transferred to heat energy being released to its surroundings.

The kinetic energy of the water molecules remains constant, while heat energy is being released to its surroundings.

The kinetic energy of the water molecules is increasing, while heat energy is being absorbed by the molecules.

Heat energy from the surroundings is being used to increase the kinetic energy of the water molecules.

Only the kinetic energy of the particles is being increased.

At midnight, you walk outside. The temperature of the air has been exactly -12 Celcius for several hours. You touch a metal fence post, a block of wood, and some snow. Apply the concept of thermal equilibrium to identify the correct statement.

The fence post, the block of wood, and the snow will all be at a temperature of -12 Celcius.

The block will have the highest temperature.

The fence post has the lowest temperature.

Determining which object will have the lowest temperature is impossible without knowing the specific heat capacities.

The process of thermal equilibrium causes cold to flow from objects with low specific heat capacities.

If a block of iron and a slice of watermelon are left in a refrigerator for a looooong period of time, compare the temperatures of both when they are immediately removed from the refrigerator.

The iron will feel colder because it is a good conductor of heat which is drawn from your fingers.

The iron will have a colder temperature than the watermelon.

The watermelon will have a colder temperature than the iron.

The iron will feel colder because it has a very high specific heat capacity.

A 100-gram ice cube at 0oC is dropped into 100 grams of water at 20oC. When the ice melts, what will be the temperature of the water? The latent heat of fusion for water is 333000 J/kg, and the specific heat capacity of water is 4186 J/kgoC. (Hint: First, determine the amount of ice the water would be able to melt.)

0 Celsius (not all the ice melts)

Thermal Physics IB Quiz Questions and Answers

Physics

Reviewed by Matt Balanda

Matt Balanda, BS (Aerospace Engineering) |

Science Teacher

Review Board Member

Matt Balanda, a Calvary Chapel Christian School leader with a Bachelor's in Aerospace Engineering and Mathematics, transitioned from Aerospace Engineering to Education with a Master's from California Baptist University. As the High School Vice-Principal and Physics teacher, he nurtures students' love of learning and faith, creating an enriching and transformational educational experience.

, BS (Aerospace Engineering)

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Rajashreebasu

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