how much energy is required to lower the temperture of 450g of sand from 60 celsius to 15 celsius
To calculate the amount of energy required to lower the temperature of a substance, you need to use the equation:
Q = mcΔT
where:
Q represents the energy (in joules) required,
m is the mass of the substance (in grams),
c is the specific heat capacity of the substance (in J/g°C), and
ΔT is the change in temperature (in °C).
First, you need to determine the specific heat capacity (c) of sand. The specific heat capacity varies depending on the composition of the sand. On average, the specific heat capacity of sand is around 0.84 J/g°C.
Next, you can plug in the given values into the equation:
m = 450g
c = 0.84 J/g°C
ΔT = 60°C - 15°C = 45°C
Q = (450g) * (0.84 J/g°C) * (45°C)
Q = 17,010 J
Therefore, it would require approximately 17,010 joules of energy to lower the temperature of 450g of sand from 60°C to 15°C.