Heat of Reaction (3)

Chemistry

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Number of moles, n represents (3)

Mole of water formed for heat of neutralisation

Number of moles, n represents (4)

Mole of fuel burnt for heat of combustion

The purpose of chemical reactions carried out

To determine the heat of reaction involve aqueous solutions

Some assumptions are made during calculations of chemical reactions (1)

The density of any aqueous solution is equal to the density of water, 1 g cm−3

Some assumptions are made during calculations of chemical reactions (2)

The specific heat capacity of any aqueous solution is equal to the specific heat capacity of water, which is 4.2 J g−1 °C−1

Some assumptions are made during calculations of chemical reactions (3)

No heat is lost to the surroundings

Some assumptions are made during calculations of chemical reactions (4)

No heat is absorbed by the apparatus of the experiment

Definition of heat of precipitation

Heat of precipitation is the heat change when 1 mole of precipitate is formed from their ions in an aqueous solution

Function of the contrast media liquid in field of medicine

- The contrast media liquid contains barium sulphate - Therefore, the digestive tract, stomach and intestines can be easily seen on the X-ray

Example of insoluble salt that is used in the fields of medicine

Barium sulphate, BaSO4

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