Thermodynamics Energy Flow

In thermodynamics, how is "work" defined?

• Energy transferred due to a temperature difference.

• Force acting over a distance.

• The internal energy of a system.

• The random motion of molecules.

In thermodynamics, what is heat?

• A form of energy that always increases temperature.

• Energy flow from high temperature to low temperature.

• The total internal energy of a system.

• A measure of the average kinetic energy of particles.

When a hand at a lower temperature touches a hot pan at a higher temperature, what happens to the energy?

• Energy flows from the hand to the pan.

• Energy flows from the pan to the hand.

• No energy transfer occurs if the contact is brief.

• The energy is converted into chemical energy.

What are the two primary categories of heat problems discussed in thermodynamics?

• Problems involving only work and problems involving only heat.

• Problems with temperature change and problems with pressure change.

• Problems with only temperature change and problems with no temperature change.

• Problems involving only phase transitions and problems involving only chemical reactions.

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When heat is added to a glass of ice water at 0°C, what happens to the temperature of the water as long as there is still ice present?

• The temperature of the water immediately increases.

• The temperature of the water decreases as the ice melts.

• The temperature of the water remains at 0°C.

• The temperature of the water fluctuates rapidly.