Question

1 The method of mixtures as a means of measuring the amount of heat of a substance depends of the principle of conservation of
momentum
energy
angular momentum
charge

2 Given that the specific capacity of ice is one-half that of water, does is take more thermal energy to raise the temperature of 5 g of water or 5 g of ice by
6oC
?
water
ice
It takes the same amount of thermal energy for each one
Each one requires specific latent heat of a vaporization

Answer 1

Answer on Question #58112-Physics-Molecular Physics/Thermodynamics

1 The method of mixtures as a means of measuring the amount of heat of a substance depends on the principle of conservation of

momentum

energy

angular momentum

charge

Answer: energy.

The heat is the one of forms of energy. Thus, this method depends on the principle of conservation of energy.

2 Given that the specific capacity of ice is one-half that of water, does it take more thermal energy to raise the temperature of $5\mathrm{g}$ of water or $5\mathrm{g}$ of ice by 60C?

water

ice

It takes the same amount of thermal energy for each one

Each one requires specific latent heat of a vaporization

Solution

$$Q_{water} = C_{water} \Delta T$$ $$Q_{ice} = C_{ice} \Delta T$$ $$\frac{Q_{water}}{Q_{ice}} = \frac{C_{water} \Delta T}{C_{ice} \Delta T} = \frac{C_{water}}{C_{ice}} = 2.$$

Answer: water.

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