Calculate the heat required, in joules, to raise the temperature of a 0.20 kg block of aluminium from 20°C to 60°C.
To calculate the heat required to raise the temperature of a substance, you can use the formula:
Q = m × c × ΔT
where:
Q is the heat required (in joules),
m is the mass of the substance (in kilograms),
c is the specific heat capacity of the substance (in joules per kilogram per degree Celsius),
ΔT is the change in temperature (in degrees Celsius).
In this case, you are trying to find the heat required to raise the temperature of a 0.20 kg block of aluminum from 20°C to 60°C.
First, you need to find the specific heat capacity of aluminum. The specific heat capacity of aluminum is approximately 900 J/kg°C.
Now we can plug in the values in the formula:
Q = (0.20 kg) × (900 J/kg°C) × (60°C - 20°C)
Simplifying the expression, we get:
Q = (0.20) × (900) × (40)
Q = 7200 J
Therefore, the heat required to raise the temperature of a 0.20 kg block of aluminum from 20°C to 60°C is 7200 joules.