A 2.5 g sample of french fries is placed in a calorimeter with 500.0 g of water at an initial temperature of 21 °C. After combustion of the french fries, the water has a temperature of 48 °C. What is the caloric value (kcal/g) of the french fries?

Question

Serena Carey

Chemistry

23 February, 15:23

A 2.5 g sample of french fries is placed in a calorimeter with 500.0 g of water at an initial temperature of 21 °C. After combustion of the french fries, the water has a temperature of 48 °C. What is the caloric value (kcal/g) of the french fries?

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Lamar Bowers · Answer 1

Q=m°C ΔT

= (500g) x (1 cal/g. °C) x (48°C-21°C) = 13500 cal

13500 cal / 1000 = 13.5 kcal

"What is the caloric value (kcal/g) of the french fries?"

13.5 kcal / 2.5 g = 5.4 kcal/g