specific heat capacity

• What is specific heat capacity?

  Energy required to raise 1 kg by 1° C
• What equation is used to calculate the change in thermal energy?

  Change in thermal energy = mass × specific heat capacity × temperature change
• What is the specific heat capacity of water?

  4,200 Joules per kilogram per °C
• What is the temperature change when heating water from 20° C to 100° C?

  80° C
• How do you calculate the mass of water in the hot water bottle?

  Rearrange the thermal energy equation
• What are the steps to calculate thermal energy change?

  1. Identify mass of the substance
  2. Determine specific heat capacity
  3. Calculate temperature change
  4. Use the equation:

  • Change in thermal energy = mass × specific heat capacity × temperature change
• What conversions can be made from Joules to kilojoules?

  • Divide Joules by 1,000
  • Example: 67,200 Joules = 67.2 kJ
• What factors affect the amount of thermal energy stored or released?

  • Mass of the substance
  • Specific heat capacity
  • Temperature change