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iVinArrow [24]
3 years ago
11

Select the correct answer. Which of the following describes a compound? (Hint: Carbon and oxygen both appear on the periodic tab

le.) A. a piece of pure carbon, containing only carbon atoms B. oxygen gas surrounding a solid piece of carbon C. a substance made of two oxygen atoms for each carbon atom D. carbon and oxygen atoms mixed without being bonded together
Chemistry
2 answers:
Alex3 years ago
6 0

c. a substance made of two o2 atoms for each carbon atom

i think...

lisov135 [29]3 years ago
3 0
I think maybe D because carbon makes oxygen *i think tho*
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The change in internal energy for the combustion of 1.0 mol of octane at a pressure of 1.0 atm is -5084.1 kj . f the change in e
TEA [102]

<u>Given:</u>

Change in internal energy = ΔU = -5084.1 kJ

Change in enthalpy = ΔH = -5074.3 kJ

<u>To determine:</u>

The work done, W

<u>Explanation:</u>

Based on the first law of thermodynamics,

ΔH = ΔU + PΔV

the work done by a gas is given as:

W = -PΔV

Therefore:

ΔH = ΔU - W

W = ΔU-ΔH = -5084.1 -(-5074.3) = -9.8 kJ

Ans: Work done is -9.8 kJ


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