Exit Flashcard: Specific Heat

Front

What is specific heat?

Back

Specific heat is the amount of heat energy required to raise the temperature of 1 gram of a substance by 1°C.

Front

How does the specific heat of a material affect its temperature change when heated?

Back

Materials with lower specific heat will experience a greater temperature change than those with higher specific heat when the same amount of heat is applied.

Front

What is the formula to calculate the heat energy (Q) absorbed or released?

Back

Q = m * c * ΔT, where m is mass, c is specific heat, and ΔT is the change in temperature.

Front

If 100 mL of water and 1000 mL of water are heated, which will heat up faster?

Back

100 mL of water will heat up faster because it has less mass and requires less energy to increase its temperature.

Front

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

Back

The particles speed up and move more vigorously as they gain energy.

Front

What is the specific heat of water?

Back

The specific heat of water is approximately 4.18 J/(g•°C).

Front

How much energy is needed to raise the temperature of 5.0 grams of lead from 25°C to 35°C? (Specific heat of lead = 0.129 J/(g•°C))

Back

6.45 J.

Front

What is the effect of mass on the specific heat capacity of a substance?

Back

The specific heat capacity is an intrinsic property of a substance and does not change with mass; however, the total heat energy required will increase with mass.

Front

If a 20 gram piece of graphite is cooled from 38°C to 18°C, how much energy is lost? (Specific heat of graphite = 0.709 J/g°C)

Back

283.6 J.

Front

What is the relationship between specific heat and temperature change?

Back

A higher specific heat means a smaller temperature change for a given amount of heat energy.