For each of the following reactions, predict the sign of ΔS°.
2Na(s) + Cl2(g) → 2NaCl(s)
KBr(s) → K+(aq) + Br−(aq)
2H2(g) + O2(g) → 2H2O(l)
C2H2(g) + 4F2(g) → 2CF4(g) + H2(g)
entropy of gas > entropy of aqueous > entropy of liquid > entropy of solid
1)
In reactant there is gas
So, reactant has more entropy than product.
So,
ΔS° is negative
2)
In product we have aqueous component and reactant is solid.
So, product has more entropy than reactant.
So,
ΔS° is positive
3)
In reactant there is gas
So, reactant has more entropy than product.
So,
ΔS° is negative
4)
In reactant there is more gas as compared to product
So, reactant has more entropy than product.
So,
ΔS° is negative
For each of the following reactions, predict the sign of ΔS°. 2Na(s) + Cl2(g) → 2NaCl(s)...
B. Calculate the standard entropy change for the reaction 2Na(s)+Cl2(g)?2NaCl(s) using the data from the following table: Substance ?H?f (kJ/mol) ?G?f (kJ/mol) S? [J/(K?mol)] Na(s) 0.00 0.00 51.30 Cl2(g) 0.00 0.00 223.1 NaCl(s) -411.0 -384.0 72.10 Express your answer to four significant figures and include the appropriate units. Part A Predict the sign of the entropy change, AS°,for each of the reaction displayed. Drag the appropriate items to their respective bins. Ag+(aq) + Cl-(aq) → AgCl(s) | | Ca(OH)2(s) →...
QUESTION 5 All of the following reactions concerning alkali metals are correct except 2Na (s) + 2H2O (I) 2NaOH (aq) + H2 (g) 2NaH (s) 2Na (s)+ H2 (g) 2Na (s) + Cl2 (g) 2NaCl (s) Na (s) + O2 (g)NaO2 (s) 2Na (s)+ S (s)Na2S (s)
Predict the sign of the entropy change, ΔS∘, for each of the reaction displayed. Ba2+ (aq) + SO42- (aq) --> BaSO4 (s) 2NO2 (g) --> N2 (g) + 2O2 (g) C5H12 (g) + 8O2 (g) --> 5CO2 (g) + 6H2O (g) 2NaClO3 (s) --> 2NaCl (s) + 3O2 (g) 2Na (s) + Cl2 (g) --> 2NaCl (s) CH3OH (l) --> CH3OH (g)
Predict the sign of the entropy change, ?S?, for each of the reaction displayed. Drag the appropriate items to their respective bins. Ba2+(aq)+SO42?(aq)?BaSO4(s) 2NaClO3(s)?2NaCl(s)+3O2(g) 2N2O(g)?2N2(g)+O2(g) 2H2(g)+O2(g)?2H2O(l) C7H16(g)+11O2(g)?7CO2(g)+8H2O(g) H2O(l)?H2O(g) Positive Negative
Predict the sign of ΔS for each of the following; explain your reasoning O2(g) → O2(l) 2 KClO4(s) → 2 KClO3(s) + O2(g) CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(l)
The change in entropy, ΔS°rxn, is related to the the change in the number of moles of gas molecules, Δngas. Determine the change in the moles of gas for each of the following reactions and decide if the entropy increases, decreases, or has little or no change. a) 2H2(g) +O2(g)->2H2O b)C2H4(g) +H2(g)-> C2H6(g) c) CH4(g) + 2O2(g) -> CO2(g)+2H2O(l) d) PCL5(s)--> PCL3(l) + CL2(g)
What is the enthalpy change, ΔH∘rxn , for each of the following reactions? 1.2.3.Ag+(aq)+Li(s)Fe(s)+2Na+(aq)2K(s)+2H2O(l)→→→Ag(s)+Li+(aq)Fe2+(aq)+2Na(s)2KOH(aq)+H2(g) Express your answers in kilojoules to four significant figures separated by commas.
A chemist measures the enthalpy change 2Na (s) Cl2 (g) 2NaCl (s) /kJmol . reaction 12Na (s) 14Cl2 (g) 12NaCl (s) 2NaCl (s) 2Na (s) Cl2 (g) 4NaCl (s) 4Na (s) 2Cl2 (g) <div id="ansed_tree_ansedimage_27" class="ansed_tree" overflow:visible;"="" unselectable="on" aria-hidden="true" style="position: absolute; left: 0px; top: 0px; z-index: 3; width: 32px; height: 24px;"> kJ
All of the following reactions can be described as displacement reactions except Select one: a. 2Na(s) + 2H2O(1) ► 2NaOH(aq) + H2(g). ob. CoH(1) + Cl2(g) → CH3C1(1) + HCl(g). oc. CuSO4(aq) + Fe(s) → Cu(s) + FeSO4(aq). O d. Zn(s) + FeCl2(aq) → ZnCl2(aq) + Fe(s). e. Cu(s) + 2AgNO3(aq) + Cu(NO3)2(aq) + 2Ag(s).
Consider this reaction: 2NaOH(aq) + H2(g) →2Na(s) + 2H2O(l) Δ H°sys = +367.58 kJ/mol ΔS°sys = –11.40 J/K·mol Calculate ΔSuniv for this reaction at 25 °C