Mothballs are comprised primarily of naphthalene (c10h8). when 1.025 g of naphthalene burns in a bomb calorimeter, the temperature rises from 24.25 degrees celsius to 32.33 degrees celsius. find the change in energy for the combustion of a mole of naphthalene. the heat capacity of the bomb calorimeter is 5.11 kj/degree celsius.

The change in energy for the combustion of a mole of naphthalene is 79 kJ

Explanation:

An excersise where you have to apply the Heat Capacity formula

C =  Q . ΔT

where C is Heat Capacity and Q is Heat

ΔT means (T° final - T° initial)

5.11 kJ/°C = Q (32.33°C - 24.25°C)

5.11 kJ/°C = Q (32.33°C - 24.25°C)

5.11 kJ/°C = Q . 8.08°C

5.11 kJ / 8.08°C = Q

0.632 kJ = Q

This heat is released by 1.025 grams of naphtalene.

Molar mass Naphtalene : 128.17 g/m

1.025 g / 128.17 g/m = 0.008 moles

This are the moles, so we have to divide heat/moles to get the change in energy for one mole.

0.632 kJ/0.008 mol = 79 kJ/m

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.