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28 Jun 2020

Of the following reactions, which of the following is only spontaneous at high enough temperatures?

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AP Chemistry
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Solve problems involving entropy and Gibbs free energy
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Related questions

which of the following statements best describes the exothermic reaction below? and why not the other options? how can I know?

2HCL (aq) + Na2C)3 (s) > 2 NaCL (aq) + CO2 (g) + H2O (l)

a. the reaction is always spontaneous

b. the reaction is spontaneous at "low" temperatures but not "high" temperatures

c. the reaction is spontaneous at "high" temperatures but not "low" temperatures

d. the reaction is never spontaneous

e. not enough information is given

part B;

at what temperature (in celsisu) does a reaction start/stop being spontaneous if the reaction has a delta Hrxn= -210.5 kj/mol and delta S=-128j/molk?

a. always spontaneous

b. 1371

c. 1645

d. 1918

e. never spontaneous

With respect to the system only, a reaction with ?H< 0 and ?S > 0 is predicted to be:

Select one:
a. Spontaneous at all temperatures
b. Spontaneous at high temperatures only
c. Spontaneous at low temperatures only
d. Nonspontaneous at all temperatures


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