A slice of pizza has 500 kcal. If the pizza is burned and its heat is used to warm a 50-L container of cold water, what would be the approximate increase in the temperature of the water? (Note: A liter of cold water weighs about 1 kg).

1 Answer
Gió
Sep 22, 2015

You can produce an increas of #10°C#

Explanation:

You can say that the heat #Q=500,000cal# from the slice of pizza can be used to produce a change #DeltaT# of temperature in a mass #m=50kg=50,000g# of water of specific heat #c=1(cal)/(g°C)# so that:
#Q=mcDeltaT#

#500,000=50,000*1*DeltaT#

#DeltaT=10°C#

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