Heat & Specific Heat

What is the formula to calculate heat energy required to raise the temperature of any substance?

• Q = m C ∆T

• Q = m ∆T

• Q = C m T

• Q = m C T

Calculate the heat absorbed by 105.0 grams of water when it is heated from 20.0°C to 99.0°C. Specific heat of water is 4.18 J/g•°C.

• 30,000 J

• 34,700 J

• 40,000 J

• 25,500 J

What is the specific heat of liquid water?

• 2.09 J/g°C

• 4.18 J/g°C

• 1.00 J/g°C

• 3.50 J/g°C

What is the relationship between temperature and thermal energy?

• As temperature increases, thermal energy decreases.

• As temperature increases, thermal energy remains constant.

• As temperature increases, thermal energy increases.

• There is no relationship between temperature and thermal energy.

If 100. Joules of heat is added to 20. grams of water, what is the temperature change?

• 0.5 °C

• 1.0 °C

• 1.2 °C

• 2.0 °C

What is the unit of specific heat?

• J/g°C

• cal/g°C

• kJ/kg·K

• J/kg·°F

What does a high specific heat mean?

• It requires more energy to change temperature.

• It changes temperature quickly with little energy.

• It has a low capacity for storing heat.

• It can easily evaporate at low temperatures.

What is thermal energy?

• The energy stored in chemical bonds of a substance.

• The total kinetic energy of particles in a substance.

• The energy associated with the motion of an object.

• The energy released during a phase change.

What does '∆T' represent in the formula Q = m C ∆T?

• The total heat energy in joules.

• The mass of the substance in kilograms.

• The change in temperature in degrees Celsius.

• The specific heat capacity in joules per kilogram per degree Celsius.

What does 'm' represent in the formula Q = m C ∆T?

• The volume of the substance in liters.

• The mass of the substance in grams.

• The temperature change in Celsius.

• The specific heat capacity of the substance.