specific heat capacity

• What is specific heat capacity?

  Energy needed to raise 1 kg by 1 °C
• Why do different materials have different specific heat capacities?

  They require different energy to increase temperature
• How much energy is needed to warm 1 kg of water by 1 °C?

  4200 J
• How much energy is needed to warm 1 kg of mercury by 1 °C?

  139 J
• What happens to materials that require a lot of energy to warm up?

  They transfer a lot of energy when cooling down
• What is the formula for change in thermal energy?

  ∆E = mc∆θ
• What do the ∆ symbols in the formula represent?

  Change in temperature or energy
• How do you calculate the change in temperature (∆θ)?

  Final temperature - Initial temperature
• What is the change in temperature (∆θ) when heating water from 10 °C to 100 °C?

  90 °C
• How much energy is needed to heat 2.00 kg of water from 10 °C to 100 °C?

  756,000 J
• What is the purpose of a formula triangle?

  To rearrange formulas easily
• What is the definition of specific heat capacity?

  • Amount of energy needed to raise the temperature of 1 kg of a substance by 1 °C
• How to find the final temperature of water after energy transfer?

  1. Calculate ∆θ using ∆E = mc∆θ
  2. Rearrange to find final temperature
• What is the specific heat capacity of water?

  4200 J/kg°C
• If 50 kJ of energy is transferred to 5 kg of water, how do you find the final temperature?

  Use ∆E = mc∆θ
• How does specific heat capacity affect energy storage in materials?

  Higher specific heat capacity means more energy storage
• What does a higher specific heat capacity indicate about a material's temperature change?

  It indicates a smaller temperature change for the same energy