Aslice of pizza has 500 kcal. if we could burn the pizza and use all the heat 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.)

10°C  

Explanation:

Heat gain by water = Heat lost by the slice of pizza

Thus,    

For water:  

Volume = 50.0 L

Density of water= 1 kg/L  

So, mass of the water:  

Mass of water  = 50 kg

Specific heat of water = 1 kcal/kg°C  

ΔT = ?

For slice of pizza:  

Q = 500 kcal

So,

ΔT = 10°C  

Increase in temperature = 10°C  

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