Answer:
121.6J
Step-by-step explanation:
Given parameters:
Mass of lead = 38g
Initial temperature = 38°C
Final temperature = 52°C
Unknown:
Amount of heat required = ?
Solution:
The amount of heat absorbed by a substance to cause a temperature change is dependent on the mass and specific heat capacity of the body. Specific heat capacity is the amount of heat needed to cause a unit temperature rise of a mass of a substance.
mathematically, heat gained;
H = m C Ф
m is the mass of the lead
Ф is the temperature change
C is the specific heat capacity
Specific heat capacity of lead is 0.16J/g°C
Insert the parameters;
H = 38 x 0.16 x (52-38) = 121.6J