AP 6.4 Heat Capacity and Calorimetry

Front

What is the total energy of all the particles in a substance called?

Back

Thermal energy.

Front

What is the formula to calculate the mass of a substance when given heat energy, specific heat, and temperature change?

Back

The formula is: \( m = \frac{q}{c \Delta T} \) where \( m \) is mass, \( q \) is heat energy, \( c \) is specific heat, and \( \Delta T \) is the change in temperature.

Front

What is the specific heat of a substance?

Back

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

Front

What is the SI unit of heat and energy?

Back

Joule.

Front

If 100.0 g of a substance at 200.0 °C reaches an equilibrium temperature of 27.1 °C when in contact with water, how do you calculate the specific heat of the substance?

Back

Use the formula: \( q_{lost} = q_{gained} \) and solve for specific heat.

Front

What is calorimetry?

Back

Calorimetry is the science of measuring the heat of chemical reactions or physical changes.

Front

What is the principle of conservation of energy in calorimetry?

Back

The principle states that energy cannot be created or destroyed, only transferred. In calorimetry, the heat lost by the hot substance equals the heat gained by the cold substance.

Front

What is the formula for calculating heat energy (q)?

Back

The formula is: \( q = mc\Delta T \) where \( m \) is mass, \( c \) is specific heat, and \( \Delta T \) is the change in temperature.

Front

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

Back

The temperature of the substance increases.

Front

What is the effect of poor insulation on a calorimetry experiment?

Back

Poor insulation can lead to heat loss to the environment, resulting in inaccurate measurements of heat transfer.