A mass of 7 kg of water is raised from 8 degrees C to the boiling point 100 degrees C.
How much heat is required? The specific
heat of water is 1000 cal/kg · degrees C.
Answer in units of cal
To determine the amount of heat required to raise the temperature of water, we can use the formula:
Q = m * c * ΔT
Where:
Q is the heat required
m is the mass of the water
c is the specific heat of water
ΔT is the change in temperature
Given:
m = 7 kg
c = 1000 cal/kg · degrees C
ΔT = (100 - 8) degrees C = 92 degrees C
Now, substitute the given values into the formula:
Q = 7 kg * 1000 cal/kg · degrees C * 92 degrees C
Q = 644,000 cal
Therefore, the heat required to raise the temperature of 7 kg of water from 8 degrees C to 100 degrees C is 644,000 calories.