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Author Question: In the presence of excess oxygen, methane gas burns in a constant-pressure system to yield carbon ... (Read 106 times)

shenderson6

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Question 1

If 356 J of work is done by a system while it loses 289 J of heat, what is the value of
◦ +645 J
◦ -645 J
◦ +67 J
◦ -67 J
◦ +134 J

Question 2

In the presence of excess oxygen, methane gas burns in a constant-pressure system to yield carbon dioxide and water:

CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O (l) ΔrH = -890.0 kJ

Calculate the value of q (kJ) in this exothermic reaction when 1.90 g of methane is combusted at constant pressure.
◦ -105.7 kJ
◦ 0.0342 kJ
◦ -0.0095 kJ
◦ 29.3 kJ
◦ -1.06 × 105 kJ


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Marked as best answer by shenderson6 on Jul 8, 2021

yasmina

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shenderson6

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Reply 2 on: Jul 8, 2021
YES! Correct, THANKS for helping me on my review


covalentbond

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Reply 3 on: Yesterday
Great answer, keep it coming :)

 

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