- #1
rullervea
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Homework Statement
How much kWh is beeing used to heat 285 liters of water in a water heater from:
1. + 5 °C to + 75 °C
2. + 20 °C to + 75 °C
Homework Equations
Found this equation:
kWh = (Q*CJ*∆t)/T
The Attempt at a Solution
Q = liter = 285
Cj = heat capacity = 4,18
∆t = 70 for 1. And 55 for 2.
T = is the time, but I'm not sure what to use here, so I used 3600.
So my answer was:
1. 23,2 kWh
2. 18,2 kWh
I have no clue if this is right or wrong because of the variable T. What is correct here?