Internal energy and specific heat capacity

• Internal energy is the total energy stored by the particles making up a substance or a system.

  Which 2 stores is it comprised of?

  Kinetic energy stores

  Potential energy stores
• Temperature is a measure of the average kinetic energy of the particles in a substance.

  The particles in a solid have kinetic energy because they are vibrating.

  The particles in a liquid or gas have kinetic energy because they move around.
• Specific heat capacity is the amount of energy required to raise the temperature of 1kg of a substance by 1°C.
• Formula for calculating a change in internal energy is?

  🔼E = mc🔼Q

  (change in internal energy (J) = mass (kg) x specific heat capacity x change in temp)
• Energy change is measured in joules (J)

  Mass is measured in kilograms (Kg)
• A material with a higher specific heat capacity requires..

  More energy to change its temperature.
• What is the specific heat capacity of water?

  4,200 J/Kg°C