Thermal Processes

Thermal energy always moves:

• From a high temperature object to a lower temperature object.
• From a lower temperature object to a higher temperature object.
• From an object with lower kinetic energy to an object with higher kinetic energy.
• From an object of higher mass to an object of lower mass.

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High temperature is connected to:

• Low kinetic energy.
• High kinetic energy.
• Zero net energy.
• Equal kinetic energies.

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At the beach on a hot day, the reason the water feels cool compared to the hot sand is due to which property?

• Mass density
• Temperature
• Specific heat
• Thermal conductivity

When thermal energy is added to a substance, the substance's particles move:

• More rapidly at an increased diestance from each other.
• More rapidly with less distance between each other.
• More slowly with a greater distance between each other.
• More slowly with a reduced distance between each other.

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When an ice cube melts on a hot plate:

• Cold is transferred from the ice cube to the hot plate.
• Thermal energy is transferred from the hot plate to the ice cube.

As seen in our lab, when a gas is heated in a closed container, the internal pressure increases. The best explanation for this increase in pressure is:

• The potential energy of the gas decreases.
• The potential energy of the gas increases.
• The average kinetic energy of the gas particles decreases.
• The average kinetic energy of the gas particles increases.

Two blocks are made of the same material but have different masses. Both blocks are at the same temperature. Which block has more thermal energy?

• The bigger block.
• The smaller block.
• Both blocks have the same amount of thermal energy.
• Neither block has any thermal energy.

The amount of thermal energy required to raise the temperature of one (1) kilogram of a substance by 1^o C is known as:

• Specific heat
• Heat of fusion
• Heat of vaporization
• Melting point

A cup of water at 40 °C and a cup of water at 5 °C are left on a table. Which graph correctly shows the temperature of the two cups of water as time passes? 

• A
• B
• C
• D

Two cups of water, one at 100^oC and the other at 50^oC are poured into a larger container. What would be the final temperature of the water?

• Less than 50^oC.
• Greaterr than 100^oC.
• Between  50^oC and 100^oC.
• The water temperature will rise and fall continually.

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