How to Calculate Standard Enthalpy Change

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You use the standard enthalpies of formation. To calculate the enthalpy change for a reaction, in your case for the combustion of ethane, you can use the standard enthalpies of formation of the species involved in the reaction.

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Question #f1f6e - Socratic

+"133 kJ/mol" The idea here is that you need to use the change in Gibbs free energy, DeltaG^@, and the change in entropy, DeltaS^@, of the reaction at 161.0^@"C" to determine the change in enthalpy of the reaction, DeltaH^@. Assuming that all the species that take part in the reaction are present at standard-state conditions, i.e. a pressure of "1 atm", you can use DeltaG^@, DeltaS^@, and ...

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Question #237b1 - Socratic

Now, the important thing to notice about the standard enthalpy of formation of ferric oxide, #"Fe"_2"O"_3#, is that it's given per mole.

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Answers created by Tom M. - Socratic

The particle p is released from rest at the top of a smooth plane inclined at angle a where sina=16/65.the distance travelled by P from top to bottom is S metres and speed of P at bottom is 8ms^-1 find S and hence speed of P when it has travelled 1/2S? How do I determine the standard enthalpy of combustion for magnesium in hydrochloric acid?

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Question #23633 - Socratic

The standard change in Gibbs free energy can be calculated using the equation color (blue) (ul (color (black) (DeltaG^@ = DeltaH^@ - T * DeltaS^@))) Here DeltaG^@ is the standard change in Gibbs free energy DeltaH^@ is the standard change in enthalpy T is the absolute temperature at which the reaction takes place DeltaS^@ is the standard change ...

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Question #0d3d9 - Socratic

-"1410 kJ/mol" Start by making sure that you have clear understanding of what heat capacity means. As you can se from the units used to express it, heat capacity tells you what the ratio between the amount of heat added, in your case, to the bomb calorimeter, and the subsequent increase in temperature. SImply put, a heat capacity of "2.47 kJ/K" tells you that you need to dd "2.41 kJ" of heat ...

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How does energy evolve in the INCOMPLETE combustion of benzene...?

Of course, I don't know that this precise stoichiometry will occur, but given thermodynamic parameters (which you have ommitted!), we could work out the enthalpy change of the reaction.

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Question #d9e98 - Socratic

An atom can lose its electron or gain electron from atoms of other elements. Electropositve metals like that in Group 1 and Group 2 of periodic table can readily donate or lose electrons. Alkali metals{Gr.1} on the account of low ionisation energy have a stong tendency to lose their single valence electron(ns1) and change to unipositive ion . NararrNa+ + 1e- By losing the solitary valence ...

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Question #6033f - Socratic

This is the case because the enthalpy of fusion of water, ΔH fus, which tells you the energy needed to convert 1 g of ice at 0∘C to liquid water at 0∘C, is equal to 333.55 J g−1.

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What is calculus? - Socratic

Probably not, but here goes! This is First Principles differentiation I will show here. But yeah, this is such a broad question that there is no answer to this question. Don't expect to understand too much of this. Very long answer. How do you calculate the gradient of a line? How about a curve? A line is easier, it's simply the change in y over the change of x. A curve is slightly more ...