Question

A 1.8 g sample of pizza is placed in a calorimeter with 500. g of water at an initial temperature of 22 C. After combustion of the pizza, the water has a temperature of 46 C. What is the heat content, in kJ/g, of the pizza?

a.90. kJ/g
b.7.0 kJ/g
c.45 kJ/g
d.28 000 kJ/g
e.28 kJ/g

Answer 1

The heat content of the pizza is approximately 0.12 kJ/g.

Step-by-step explanation:

To calculate the heat content of the pizza, we need to use the equation:

q = mcΔT

where q is the heat content, m is the mass of the pizza, c is the specific heat capacity of water, and ΔT is the change in temperature.

Given:

Mass of pizza = 1.8 g

Mass of water = 500 g

Initial temperature = 22°C

Final temperature = 46°C

Using the specific heat capacity of water, which is 4.18 J/g°C, we can calculate the heat content:

q = (1.8 g)(4.18 J/g°C)(46°C - 22°C)

q = 119.856 J = 0.119856 kJ

Therefore, the heat content of the pizza is approximately 0.12 kJ/g.