Question

When a 8 gram slice of bread is burned under a beaker of 4500 grams of water, it heats up the water by 1.3 degrees Celsius. The specific heat of water is 1 cal/g degree C. How many calories does this slice of bread contain

Answer 1

Answer:

$5850\ \text{cal}$

Explanation:

m = Mass of water = 4500 g

c = Specific heat of water = $1\ \text{cal/g}^{\circ}\text{C}$

$\Delta T$ = Change in temperature of water = $1.3^{\circ}\text{C}$

Heat is given by

$q=mc\Delta T\\\Rightarrow q=4500\times 1\times 1.3\\\Rightarrow q=5850\ \text{cal}$

A slice of the bread contains $5850\ \text{cal}$.