4.3.2.2 Temperature Changes in a System and Specific Heat Capacity

Question 1

What does an increase in temperature of a system depend on if the temperature of a system increases?

Answer 1

• if the temperature of the system increases, the increase in temperature depends on the mass of the substance heated, the type of material and the energy input to the system

Question 2

Specific heat capacity:

Answer 2

• amount of energy needed to heat 1kg of a material by 1 degrees C
• different materials have different specific heat capacities

Question 3

Formula to calculate change in energy of a system:

Answer 3

• P = change in energy / t
• change in energy = Pt
  = IVt
• I is current (A), measured using ammetre
• V is potential difference (V), measured using voltmetre
• t is time (s) measured using stopwatch

Question 4

How do you find specific heat capacity from a graph showing change in energy as temperature increases?

Answer 4

specific heat capacity is gradient