3. One calorie is the energy required to raise one gram of water one degree Celsius. Since we use the joule as the standard measurement of energy, 1 calorie = 4.184 J. If a pot is placed on the stove with 2.4 liters of water at a temperature of 27°C, how many joules are required to bring the water to its boiling point? You may neglect heat loss to the environment. If this occurs in a period of 11 minutes, what is the average rate of heat transfer in joules per second? This is for the entire 2.4 liters of water. What if we want to know the heat transfer rate for just 1 liter of water? Assuming this occurs on an electric stove and the pan completely covers the burner, what type of energy transfer is occurring?
2.4LH2O*1000gH2O/1LH2O=2400gH2O
27cal*4.184J/99.97cal=1.13J
2400*1.13J=2.712*10^4J/g
I don't know if i'm doing this right?
4 answers