Answer:
70000J
Explanation:
Given parameters:
Mass of wooden chair = 20kg
Initial temperature = 15°C
Final temperature = 20°C
Specific heat of wood = 700J/kg°C
Unknown:
Thermal energy change = ?
Solution:
The wood must have significantly absorbed some certain amount of heat to cause a thermal energy change into this. This quantity of heat it takes in will cause the thermal change.
Quantity of heat = m c Δt
where m is the mass of the wooden chair
c is the specific heat of the wood
Δt is the change in temperature
Input the variables;
H = 20 x 700 x (20 - 15)
= 70000J
