https://socratic.org › questions › 55839562581e2a0d82fb4e08

Question #b4e08 - Socratic

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. More specifically, you can calculate the enthalpy change of a reaction by DeltaH_"rxn" = sum(n * DeltaH_"f prod"^@) - sum(m * DeltaH_"f react"^@), where …

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SHA-512 hash - Monocypher

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https://socratic.org › questions › 5906acc711ef6b56899eb3dd

Question #eb3dd - Socratic

1 mai 2017 · 206.00 kJ mol^ (-1) The formula to calculate the heat change of a reaction is ΔH = -mcΔT (where m is the mass of the fluid whose temperature changes which in this case is water, c is the specific heat capacity of water and ΔT is the change in temperature of water) Heat change when 0.025 mol of Na is added = -100 * 4.18* (35.75-25.00) = -5138.5 J Now this is heat …

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https://socratic.org › questions › how-do-you-calculate-the-delta-h-for-c-2h-5oh-3o-2

How do you calculate the DeltaH for the combustion of C_2H_5OH ...

28 nov. 2016 · For a start you don't calculate it. You want the enthalpy change for the following reaction: C_2H_5OH (l) +3O_2 (g) rarr 2CO_2 (g) + 3H_2O (l) +Delta This is NOT calculated, but measured. Of course, if you have certan parameters, i.e. DeltaH""^@""_f for the reactants and products (you have for ONE of the reactants, which?), you can do an enthalpy summation, but …

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https://socratic.org › questions › 5a23725db72cff47552d9e98

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 …

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https://socratic.org › questions › 5700383d7c014975f8de0fe4

Given a reaction that was exothermic as written, what enthalpy …

7 avr. 2018 · You mean the reverse of say a combustion reaction? CH_4(g) + 2O_2(g) rarr CO_2(g) + 2H_2O(g) + 890*kJ This is the standard combustion reaction. Now, ordinarily, DeltaH would be listed separately as a NEGATIVE quantity, to show that the reaction is exothermic, which indeed it is because we are making strong C=O and O-H bonds. The reverse is simply: …

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