Honors Chem Chapter 5

Front

What is specific heat capacity?

Back

Specific heat capacity is the amount of heat required to raise the temperature of 1 gram of a substance by 1 degree Celsius.

Front

How do you calculate the heat absorbed or released by a substance?

Back

The heat (q) absorbed or released can be calculated using the formula: q = m * c * ΔT, where m is mass, c is specific heat capacity, and ΔT is the change in temperature.

Front

What is the relationship between mass and temperature change when energy is absorbed?

Back

For a given amount of energy absorbed, a smaller mass will experience a larger temperature change compared to a larger mass.

Front

What is the formula for calculating temperature change?

Back

The formula for calculating temperature change is ΔT = q / (m * c), where q is the heat energy, m is the mass, and c is the specific heat capacity.

Front

What does a negative ΔH value indicate in a thermochemical reaction?

Back

A negative ΔH value indicates that the reaction is exothermic, meaning it releases heat energy.

Front

How do you determine the amount of heat released in a reaction based on moles?

Back

To determine the heat released, multiply the number of moles of the reactant by the ΔH value of the reaction.

Front

What is the specific heat of water?

Back

The specific heat of water is 4.18 J/g°C.

Front

What happens to the temperature of a substance when it absorbs heat?

Back

When a substance absorbs heat, its temperature increases, provided it is not undergoing a phase change.

Front

What is the significance of the specific heat capacity in thermal processes?

Back

Specific heat capacity is significant because it determines how much energy is needed to change the temperature of a substance, influencing heating and cooling processes.

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state in which two objects in contact with each other reach the same temperature and no heat flows between them.