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77julia77 [94]
3 years ago
13

4. Explain why 50 g of liquid water at 0°C heats-up more quickly than 50 g of an ice water mixture at 0°C under the same conditi

ons.
5. How much energy (in kilocalories, kcal) is needed to melt 33.8 g of ice at 0.0°C?
6. How much energy (in kilocalories, kcal) is needed to warm 33.8 g of liquid water from 0.0°C to 37.0°C?

PLEASE HELP WITH ALL 3 NUMBERS 4,5,6
Chemistry
1 answer:
Minchanka [31]3 years ago
5 0
4) the ice has to be heated up to above 0c first, as it is continuing to cool the water back toward 0c
5) 0.0338 kcal
(33.8/1000)
6) 1.2506 kcal
((33.8*37.0)/1000)
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The balanced chemical reaction would be as follows:

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We are given the amount of the peroxide that decomposes. Using this as the starting point for the calculations, we can determine the amount of O2 produced. We do as follows:

14.3 mol H2O2 ( 1 mol O2 / 2 mol H2O2 ) = 7.15 mol O2 produced
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Spectroscopy be used to distinguish between the following is the compound B has a peak at 3200 – 3500 cm⁻¹ in its IR spectrum.

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Spectroscopy is the study of emission or absorption of light. It is used to study the structure of atoms and molecules.

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Long answer

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Fats are stored energy blocks which can be used by the body at its own convenience whenever there is a deficit of energy in the body. They can also be directly burnt to give energy in cases where energy needs of the body are not met by dietary intake

Carbohydrates are the most convenient and preferable source of energy in the body and are easily converted to give out immidiate energy to the body, excess carbohydrates can be converted into fats and stored for later usage as and when required by the body.

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Fats are used for energy after they are broken into fatty acids. Protein can also be used for energy, but the first job is to help with making hormones, muscle, and other proteins.

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