How does salt change the specific heat capacity of water?

Answer 1

Increasing the concentration of the salt decreases the specific heat capacity of the water.

When we heat a sample of water, the energy goes into raising the energy levels of its various vibrational, rotational, and translational motions.

When we dissolve #"NaCl"# in water, the ions are held in a rigid cage of water molecules.

The cage is rigid enough so that the motions of its molecules are "frozen out".

The added heat cannot go into increasing the energy of these motions, so it goes into increasing the energies of the other water molecules in the solution.

It takes less energy to activate these molecules, so the specific heat of the water decreases.

The greater the concentration of NaCl, the lower the specific heat capacity of the solution.

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Answer 2

Salt dissolved in water increases the specific heat capacity of the solution compared to pure water. This is because the presence of salt disrupts the hydrogen bonding between water molecules, requiring more energy to raise the temperature of the solution.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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