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seraphim [82]
3 years ago
9

Which component of a Milankovitch cycle is related to periodic ice ages throughout Earth's history? A. Axial precession B. Apsid

al precession C. Cloud cover feedback D. Precession of the ecliptic
Biology
2 answers:
Dafna1 [17]3 years ago
5 0

Answer:

I just took the test the answer is Apsidal precession.

Leviafan [203]3 years ago
3 0

The answer is c because the precession of the ecliptic was component of a milankovitch cycle  and is related to periodic ice ages through out history

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How is enthalpy used to predict whether a reaction is endothermic or exothermic?
Radda [10]

<u>Answer:</u>

<em>329.48 KJ/mol heat is released by the combustion of 2 molof methane</em>

<u>Explanation:</u>

The value of enthalpy determines whether the reaction is exothermic or endothermic. If the enthalpy change is positive, then the reaction is endothermic (heat or energy released) and if the enthalpy change is negative then the reaction is exothermic (heat or energy absorbed).

2CH_4(g)+4O_2(g) => 2CO_2(g)+4H_2O(g)

\Delta H \ reaction=[ 2(\Delta HfCO_2)+ 4(\Delta HfH_2O)]-[2(\Delta HfCH_4)+4(\Delta HfO_2)]

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                           = -787 KJ/mol+1116.48 KJ/mol

                                          =329.48 KJ/mol

<em>In this question, </em><em>the enthalpy of formation</em><em> has positive value and hence the </em><em>reaction is endothermic</em><em> in which the heat is released. </em>

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Answer:

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