27 Points Please Help ASAP!! View Attached Image!! Will Mark Brainliest If All Are Answered!!
1 answer:
<em>Hello Human!!</em>
<em>The answer is below!!</em>
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<em>14. </em><em>The answer is </em><em>C. </em><em>Mass</em>
<em>15. </em><em>I think the right answer is </em><em>C. </em><em>Melting point</em>
<em>16. </em><em>I don't know this is right.... </em><em>D. </em><em>Ability to oxidize </em>
<em>17. </em><em>I also don't know this right as well... So </em><em>A. </em><em>Generally, a gas is in the gaseous state at room temperature and a vapor is in either the solid state or liquid state at room temperature.</em>
<em>P.S </em><em>Tell me if this wrong....</em>
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Answer : The internal energy change is, -506.3 kJ/mol
Explanation :
Formula used :
or,
where,
= change in enthalpy =
= change in internal energy = ?
= change in moles
Change in moles = Number of moles of product side - Number of moles of reactant side
According to the reaction:
Change in moles = 0 - 2 = -2 mole
That means, value of = 0
R = gas constant = 8.314 J/mol.K
T = temperature =
Now put all the given values in the above formula, we get
Therefore, the internal energy change is -506.3 kJ/mol