Question

what are the signs of entropy change and enthalpy change for the combustion reaction of magnesium?...

what are the signs of entropy change and enthalpy change for the combustion reaction of magnesium? Why?

2Mg(s) + O2(g) -> 2MgO(s)

A) Delta H > 0, Delta S > 0

B) Delta H > 0, Delta S < 0

C) Delta H < 0, Delta S > 0

D) Delta H < 0, Delta S < 0

0 0
Add a comment Improve this question Transcribed image text
Know the answer?
Add Answer to:
what are the signs of entropy change and enthalpy change for the combustion reaction of magnesium?...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
  • Part A Predict the sign of the entropy change, ΔS∘, for each of the reaction displayed. Drag the appropriate items to...

    Part APredict the sign of the entropy change, ΔS∘, for each of the reaction displayed.Drag the appropriate items to their respective bins.Ag+(aq)+Cl−(aq)→AgCl(s)2KClO3(s)→2KCl(s)+3O2(g)2N2O(g)→2N2(g)+O2(g)2Mg(s)+O2(g)→2MgO(s)C7H16(g)+11O2(g)→7CO2(g)+8H2O(g)H2O(l)→H2O(g)Part BCalculate the standard entropy change for the reaction2Mg(s)+O2(g)→2MgO(s)using the data from the following table:SubstanceΔH∘f (kJ/mol)ΔG∘f (kJ/mol)S∘ [J/(K⋅mol)]Mg(s)0.000.0032.70O2(g)0.000.00205.0MgO(s)-602.0-569.627.00Express your answer to four significant figures and include the appropriate units.ΔS∘ =

  • What is the meaning of delta H (change in enthalpy), delta S (change in entropy) and...

    What is the meaning of delta H (change in enthalpy), delta S (change in entropy) and delta G (change in Gibbs free energy) as it relates to mixing two liquids together? In what situations is each of these variables negative/positive?

  • Which reaction or process has the greatest positive change in entropy, ∆S? H+(ag) + Cl-(ag) =>...

    Which reaction or process has the greatest positive change in entropy, ∆S? H+(ag) + Cl-(ag) => HCl(g) 2C2H2(g) + 5O2(g) => 4CO2(g)+2H2O(l) 2Mg(s) + O2(g) => 2MgO(s) 2C2H2(g) + 5O2(g) => 4CO2(g)+2H2O(g) 2SO2(g) + O2(g) => 2SO3(g) The Chalk Point Maryland, generating station supplies electrical power to the Washington, D.C. area. Units 1 and 2 have a gross generating capacity of 710 MW (Megawatt). The stem pressure is 25x106 Pa, and the superheated outlet temperature (Th) is 5400C. The condensate...

  • 6. Enthalpy of Heat of Combustion, AHo Entropy, So 393.5 285.8 -1366.7 5.740 130.6 160.7 69.91 20...

    Thermochemistry Help 6. Enthalpy of Heat of Combustion, AHo Entropy, So 393.5 285.8 -1366.7 5.740 130.6 160.7 69.91 20g) a. Write a separate, balanced chemical equation for the combustion of each of the following: C H2and C,HOH Combustion of C(s): Combustion of H2g Combustion of C,H OHu AH combustionCH,OH (1,- In principle, ethanol can be prepared by the following reaction: Using the reactions you wrote in (a), calculate the standard enthalpy change, Consider the only products to be CO, and/or...

  • Predict the sign of the entropy change, ΔS∘, for each of the reaction displayed. Drag the appropriate items to their r...

    Predict the sign of the entropy change, ΔS∘, for each of the reaction displayed. Drag the appropriate items to their respective bins. Pb2+(aq)+2Cl−(aq)→PbCl2(s) CaCO3(s)→CaO(s)+CO2(g) 2NH3(g)→N2(g)+3H2(g) 2Mg(s)+O2(g)→2MgO(s) C5H12(g)+8O2(g)→5CO2(g)+6H2O(g) H2O(l)→H2O(g) Positive                                                   Negative

  • Predict the signs, comment and then calculate the enthalpy and entropy changes for the reaction of...

    Predict the signs, comment and then calculate the enthalpy and entropy changes for the reaction of combustion ofmethane at 500 K. Will the reaction be spontaneous at 500 K? CH4(g) + 2 O2(g) → CO2(g) + 2H2O(g) We give: The enthalpies of formation of the products at 298.15 K in kJ/mol are: ∆Hf(CO2) = - 393.51; ∆Hf(H2O) = - 241.82; ∆Hf(CH4) = -74.81. The heat capacities at constant pressure in J.mol-1.K-1: Cp(CO2) = 37.11; Cp(H2O) = 33.58; Cp(CH4) = 35.31;...

  • Magnesium oxide can be made by heating magnesium metal in the presence of oxygen. The balanced...

    Magnesium oxide can be made by heating magnesium metal in the presence of oxygen. The balanced equation for the reaction is: 2Mg(s)+O2(g)→2MgO(s) When 10.1 g of Mg are allowed to react with 10.5 g of O2, 13.9 g of MgO are collected. a) Determine the limiting reactant for the reaction. b) Determine the theoretical yield for the reaction. c) Determine percent yield for the reaction.

  • Predict the signs of delta H (Enthalpy) and delta S (Entropy) for the evaporation of water at 85 C

    Predict the signs of delta H (Enthalpy) and delta S (Entropy) for the evaporation of water at 85 C.

  • Calculate the enthalpy change ∆Hº, of the following combustion reaction:                                

    Calculate the enthalpy change ∆Hº, of the following combustion reaction:                                   2 H2S(g)     +      3 O2(g)      →      2 H2O(l)       +      2 SO2(g) ∆Hfº                      –20.2                    0                     –285.840               –296.8 (kJ/mol)             A. –1124.9 kJ                                 B. –562.4 kJ                             C. –1385.5 kJ               D. –828.1 kJ                                   E. –906.3 kJ Please explain your answer

  • Question 5 The spontaneity of a reaction depends both on the enthalpy change, Delta H, and...

    Question 5 The spontaneity of a reaction depends both on the enthalpy change, Delta H, and entropy change, Delta S. Reactions that release energy produce more stable products, and the universe tends toward disorder. Thus, an exothermic reaction with a positive entropy change will always be spontaneous. Mathematically, this relationship can be represented as where Delta G is the change in Gibbs free energy and T is the Kelvin temperature. If Delta G is negative, then the reaction is spontaneous....

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT