Physics, 20.07.2019 19:30 tladitidimatso1783

How much heat (in kj) is required to warm 11.0 g of ice, initially at -13.0 ∘c, to steam at 111.0 ∘c? the heat capacity of ice is 2.09 j/g⋅∘c and that of steam is 2.01 j/g⋅∘c?

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Heating ice from -13°C to 0°C
Q1 = mCΔT = 11*2.09*(0--13) = 11*2.09*13 = 298.87 J

Melting ice at 0°C, with latent heat of fusion being 333 J/g
Q2 = mC = 11*333 = 3663 J

Heating water from 0°C to 100°C, with specific heat of water being 4.184 J/g.°C
Q3 = mCΔT = 11*4.184*100 = 4602.4 J

Vaporizing water at 100°C with latent heat of vaporization being 2230 J/g
Q4 = mC = 11*2230 = 24530 J

Heating steam from 100°C to 111°C
Q5 = mCΔT = 11*2.01*(111-100) = 243.21 J

Total heat required, Q =Q1+Q2+Q3+Q4+Q5 = 298.87+3663+4602.4+24530+243.21 = 33337.48 J ≈ 33.34 kJ

Answer from: jaass28

The total heat required will be 33.35 KJ.

Explanation:

In this question there are two kinds of processes.

1) Heat required for change in temperate = mC∆T

2) Heat required for state change = mass × heat of fusion or latent heat of vaporization

We need some other constants to solve this question.

Heat of fusion of water = 334 J/g

Latent heat of vaporization = 2230 J/g

Specific heat of water = 4.184 J/g0C

Heat required to change temperature from -13 to 0 degree centigrade

Q1 = (11)(2.09)(13) = 298.87 J

Heat required in converting ice to water at 0 degree centigrade

Q2 = (11)(334) = 3674 J

Heat required to change temperature from 0 to 100 degree centigrade

Q3 = (11)(4.184)(100) = 4602.4 J

Heat required in converting water to water vapors at 100 degree centigrade

Q4 = (11)(2230) = 24530 J

Heat required to change temperature from 100 to 111 degree centigrade

Q5 = (11)(2.01)(11) = 243.21 J

Total heat required will be:

Q = Q1 + Q2 + Q3 + Q4 + Q5

Q = 298.87 + 3674 + 4602.4 + 24530 + 243.21 = 33348.48 J

Q = 33.35 KJ

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The answer is water molecules are split.cellular respiration and photosynthesis are complement reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins, glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus, when respiration begins, water molecules are split.

Answer from: Quest

Answer(b) 60 miles per hour;

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How much heat (in kj) is required to warm 11.0 g of ice, initially at -13.0 ∘c, to steam at 111.0 ∘c...