Final Review - Unit 5 (H)

Front

What happens when two solids at different temperatures are placed in contact?

Back

Heat energy flows from the hotter solid to the cooler solid until thermal equilibrium is reached.

Front

What occurs to the particles of a substance when heat is added?

Back

The particles speed up as they gain energy.

Front

What is specific heat?

Back

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

Front

Why is low specific heat desirable for a cooking skillet?

Back

A low specific heat allows the skillet to change temperature quickly, making it more responsive to heat adjustments.

Front

What does a potential energy diagram represent in a chemical reaction?

Back

It shows the energy changes during the reaction, including the energy of reactants, products, and the activation energy.

Front

What is enthalpy change in a reaction?

Back

Enthalpy change is the difference in energy between the products and reactants, often represented in potential energy diagrams.

Front

Define activation energy.

Back

Activation energy is the minimum energy required for reactants to undergo a chemical reaction.

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state in which two objects in contact no longer transfer heat energy to each other.

Front

How does heat transfer occur between two solids?

Back

Heat transfers from the solid with higher temperature to the solid with lower temperature.

Front

What is the relationship between temperature and particle motion?

Back

As temperature increases, the motion of particles increases.