Question

How much heat do you need to raise the temperature of 100 g of aluminum from 30°C to 150°C?

Answer 1

Answer: The heat required by aluminium will be 10800 J

Explanation:

To calculate the amount of heat absorbed or released, we use the equation:

$q=mc\Delta T$

where,

q = amount of heat absorbed or released = ? J

m = mass of the substance = 100 g

c = specific heat of aluminium = 0.90 J/ g°C

$\Delta T$ = change in temperature = $[150-30]^oC=120^oC$

Putting values in above equation, we get:

$q=100g\times 0.90J/g^oC\times 120^oC\\\\q=10800J$

Hence, the heat required by aluminium will be 10800 J

Answer 2

Heat energy can be calculated by using the specific heat of a substance multiplying it to the mass of the sample and the change in temperature. It is expressed as:

 Energy = mCΔT

Energy = 100 (0.90) (150 -  30)

Energy = 10800 J