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 combus

Question

Irina18 [472]

4 years ago

9

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 combus

tion of the french fries, the water has a temperature of 48 °C. What is the caloric value (kcal/g) of the french fries?

Chemistry

1 answer:

SIZIF [17.4K] · Answer 1 · 2021-12-22T00:03:09+03:00

SIZIF [17.4K]4 years ago

8 0

Q=m°C<span>ΔT
=(500g) x (1 cal/g.</span>°C) x (48°C-21°C) = 13500 cal
13500 cal / 1000 = 13.5 kcal

<span>"What is the caloric value (kcal/g) of the french fries?"
13.5 kcal/ 2.5 g = 5.4 kcal/g</span>