Respuesta :
Answer: 66 cal
Explanation:
The Heat energy required to flow into a unit mass object to raise its temperature by 1 degree is known as specific heat capacity.
It is given by:
Q = m c ΔT
where, m is the mass, c is the specific heat capacity and ΔT is the change in temperature.
Given:
specific heat capacity of aluminum, c = 0.22 cal/g°C
mass of aluminium, m = 20.0 g
Change in temperature, ΔT = 15°C
⇒Q = 20.0 g × 0.22 cal/g°C × 15°C = 66 cal
The amount of energy that needs to flow into 20.0 grams of aluminum to change its temperature by 15°C is 66 cal.
