Thermodynamics Flashcardizz

Front

What happens to the molecules in water as the temperature increases from 20°C to 30°C?

Back

The molecules speed up and their average kinetic energy increases.

Front

In which direction does heat energy flow between two metal blocks at different temperatures?

Back

Heat energy flows from the hotter block to the cooler block.

Front

What happens to the thermal energy of a metal spoon placed in hot soup over time?

Back

The spoon will increase in thermal energy, and the soup will decrease in thermal energy.

Front

Which state of matter has the greatest average kinetic energy?

Back

Water boiling in a pot on a stove.

Front

Why does a person feel cooler when sweat evaporates?

Back

Heat from the body is absorbed by sweat when it evaporates.

Front

Define kinetic energy.

Back

Kinetic energy is the energy an object possesses due to its motion.

Front

What is thermal energy?

Back

Thermal energy is the total kinetic energy of the particles in a substance.

Front

Explain the concept of heat transfer.

Back

Heat transfer is the movement of thermal energy from a hotter object to a cooler one.

Front

What is the difference between conduction, convection, and radiation?

Back

Conduction is heat transfer through direct contact, convection is heat transfer through fluid movement, and radiation is heat transfer through electromagnetic waves.

Front

What is the significance of the specific heat capacity of a substance?

Back

Specific heat capacity is the amount of heat required to raise the temperature of a unit mass of a substance by one degree Celsius.