Final answer:
The heat required to heat water from 25°C to 100°C is calculated using specific heat capacity. The temperature conversion from Celsius to Fahrenheit for 15°C results in 59°F.
Step-by-step explanation:
The student is asking how much heat is required to heat 3 hours of water from 25 degrees Celsius to 100 degrees Celsius. To find this, you would use the specific heat capacity of water which is 4.18 J/g°C. The amount of heat required (Q) can be calculated using the formula Q = mcΔT, where m is the mass of water, c is the specific heat capacity, and ΔT is the change in temperature. The expression of the temperature of 15 degrees Celsius in Fahrenheit can be found using the conversion formula: F = (C × 9/5) + 32.
To provide a specific calculation, we would need the mass of the water being heated. For the second part, 15 degrees Celsius can be converted to Fahrenheit as follows: F = (15 × 9/5) + 32 = 59 degrees Fahrenheit.