heat and temperaturesection 2 specific heat capacity specific heat capacity (c): the amount of heat...
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Heat and Temperature Section 2
Specific Heat Capacity
• specific heat capacity (c): The amount of heat required to raise the temp. of one gram of a specific material by 1 °C
Heat and Temperature Section 2
Specific Heat Capacity, continued
• Specific heat capacity describes how much energy is required to raise an object’s temperature.
• Specific heat capacity is a characteristic physical property of matter– It is represented by c.
• Specific heat capacity can be used to figure out how much energy it takes to raise an object’s temperature.
Heat and Temperature Section 2
Specific Heat Capacity, continued
Specific Heat Capacity Units
-calories (cal),
-kilocalories a.k.a. Calories (Cal),
-or Joules (J)
Specific Heat of Water = 1 cal
g·ºCWhat does this mean?
Heat and Temperature Section 2
Specific Heat Capacity, continued
Specific Heat Equation (on your formula sheet)
Total heat energy = temperature mass specific heat capacity
Total Heat = mcT
Δ heat energy = Δ temperature mass specific heat capacity
Q = mc Δ T
Heat and Temperature Section 2
Variable Symbol Units
∆ Heat Q cal or J (Joules)
Mass m g
Sp. Ht. Cap. C J or cal
g·°C g·°C
∆Temp. ∆T °C or K
Heat and Temperature Section 2
Values of Specific Heat at 25 °C
Heat and Temperature Section 2
Math Skills
Specific Heat Capacity Calculations
How much energy must be transferred as heat to 200 g of water in a bathtub to raise the water’s temperature from 25 °C to 37 °C?
Heat and Temperature Section 2
Math Skills, continued
2. Write down the specific heat equation.
energy = cmT
3. Substitute the specific heat, mass, and temperature change values, and solve.
4,186 Jenergy (200 kg) (12 K)
kg K
4energy = 10,000,000 J = 1.0 10 kJ
Heat and Temperature Section 2
Specific Heat, continued
• Heat raises an object’s temperature or changes the object’s state.– While a substance is melting or boiling, the temperature
does not change.
Heat and Temperature Section 2
Visual Concept: Heating Systems
Heat and Temperature Section 2
Visual Concept: Refrigeration