A college student produces about 127 kcal of heat per hour onthe average. What i

Question

A college student produces about 127 kcal of heat per hour onthe average. What is the rate of energy production inwatts?____W How many kilocalories of heat does the operation of a 1195 Whair dryer produce each second? __kcal/s How much heat in kcal must be added to 0.68 kg of water atroom temperature ( 20oC) to raise the temperature to39oC?___kcal A college student produces about 127 kcal of heat per hour onthe average. What is the rate of energy production inwatts?____W How many kilocalories of heat does the operation of a 1195 Whair dryer produce each second? __kcal/s How much heat in kcal must be added to 0.68 kg of water atroom temperature ( 20oC) to raise the temperature to39oC?___kcal

Explanation / Answer

1) 127 kcal= 147 watts 2) 1195 watts = 1027.5 kcal
One calorie is the amount of energy required to raise one gramof water one degree in Celcius (or Kelvin but since they are thesame, it doesn't matter.)
3) 680 grams of water. 19 degree change in temperature.19*680= 12920 calories or 12.92 kcals.

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