Energy Transfer Flashcard

Front

What is energy transfer?

Back

Energy transfer is the process of energy moving from one object or system to another, often resulting in a change in temperature or state.

Front

What is the formula to calculate the energy used to heat water?

Back

cal = m × ΔT, where 'm' is the mass of the water in grams and 'ΔT' is the change in temperature in degrees Celsius.

Front

If a student heats 50 mL of water from 0°C to 60°C, how much energy is used?

Back

3000 cal.

Front

What happens to energy when two objects are at the same temperature?

Back

Energy transfers back and forth between the objects, but there is no net transfer.

Front

True or False: Particles in a solid and in the air at the same temperature have the same average kinetic energy.

Back

True.

Front

What happens to the energy of a hot object placed next to a cold object?

Back

The hot object transfers energy to the cold object until they reach thermal equilibrium.

Front

In a system with a hot cake and a cold plate, which transfers energy?

Back

Both cakes transfer energy to the plate.

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state in which two objects in contact no longer transfer energy to each other because they are at the same temperature.

Front

True or False: The kinetic energy of hot chocolate particles increases when cold milk is added.

Back

False.

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion, which is related to the speed and mass of the object.