Above what temperature does the following reaction become nonspontaneous, i.e. DH and TDS are equal?

FeO(s) + CO(g) â CO2(g) + Fe(s)

ÎH = -11.0 kJ; ÎS = -17.4 J/K

Question 77 options:

A.
FeO(s) + CO(g) â CO2(g) + Fe(s) ÎH = -11.0 kJ; ÎS = -17.4 J/K

B.
298 K

C..
191 K

D.
This reaction is spontaneous at all temperatures.

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Deanna HettingerLv2

31 Dec 2019

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Related questions

Classify each of the following reactions as one of these four types:
â¢ spontaneous at all temperatures
â¢ not spontaneous at any temperature
â¢ spontaneous below a certain temperature but not above
â¢ spontaneous above a certain temperature but not below

(a) KClO3 (s) + S (s) Â® KCl (s) + SO3 (g); ÎH = -435 kJ; ÎS = 164 J/K
(b) C2H5OH (g) Â® C2H4 (g) + H2O (g); ÎH = 45.5 kJ; ÎS = 125.7 J/K
(c) 2 NO (g) + O2 (g) Â® 2 NO2 (g); ÎH = -115.4 kJ; ÎS = -146.5 J/K
(d) PbS (s) + Mg (s) Â® MgS (s) + Pb (s); ÎH = 66 kJ; ÎS = -9 J/K

Consider the following reaction:
CaCO3(s)âCaO(s)+CO2(g).
Estimate ÎGâ for this reaction at each of the following temperatures. (Assume that ÎHâ and ÎSâ do not change too much within the given temperature range.)

Part A

320 K

ÎGâ =

Part B

1095 K

ÎGâ =

Part C

1445 K

ÎGâ =

Part D

Predict whether or not the reaction in part A will be spontaneous at 320 K .

-spontaneous