The amount of heat needed to raise the temperature of a 2kg object from 15°C to 25°C is 34000J.
HOW TO CALCULATE SPECIFICHEATCAPACITY:
The amount of heat absorbed by an object can be calculated by using the following expression:
Q = m.c.∆T
Where;
Q = amount of heat absorbed or released (J)
m = mass of object
c = specific heat capacity (J/g°C)
∆T = change in temperature (°C)
According to this question, 2 kg object has a specific heat capacity of 1,700J/kg°C and was raised from a temperature of 15 Celsius to 25 Celsius. The heat absorbed is calculated as follows:
Q = 2 × 1700 × {25 - 15}
Q = 3400 × 10
Q = 34000J
Therefore, the amount of heat needed to raise the temperature of a 2kg object from 15°C to 25°C is 34000J.
