Given the following table of thermodynamic data, complete the following sentence

Question

Given the following table of thermodynamic data,

complete the following sentence. The vaporization of H2O2(l) is ________

nonspontaneous at all temperatures

spontaneous at all temperatures

spontaneous at low temperature and nonspontaneous at high temperature

nonspontaneous at low temperature and spontaneous at high temperature

not enough information given to draw a conclusion

A)

nonspontaneous at all temperatures

B)

spontaneous at all temperatures

C)

spontaneous at low temperature and nonspontaneous at high temperature

D)

nonspontaneous at low temperature and spontaneous at high temperature

E)

not enough information given to draw a conclusion

Substance AHf (k mol) S (J mol K) H202 (g 136.3 232.6 i S7.S 110

Explanation / Answer

answer : nonspontaneous at low temperature and spontaneous at high temperature

explanation:

H2O2 (l) -------------------> H2O2 (g)

delta H   = (-136.3 +187.8) = 51.5 kJ

delta S = 232.6 - 110 = 122.6 J / K

delta G = delta H - delta S

for spontaneous delta G should be negative . to get delta G negative high temprature needed

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