ThermochemistryHard
Question
For the given reactions
SiO2 + 4HF → SiF4 + 2H2O, ᐃH = -10.17 kcal
SiO2 + 4HCl → SiCl4 + 2H2O, ᐃH = 36.7 kcal
In may be concluded that
SiO2 + 4HF → SiF4 + 2H2O, ᐃH = -10.17 kcal
SiO2 + 4HCl → SiCl4 + 2H2O, ᐃH = 36.7 kcal
In may be concluded that
Options
A.HF will attack SiO2 and HCl will not
B.HCl will attack SiO2 and HF will not
C.HF and HCl both attack SiO2
D.None attacks SiO2
Solution
ᐃG = ᐃH - T ᐃS = -ve
All exothermic reactions are spontaneous, hence HF will attack SiO2.
All exothermic reactions are spontaneous, hence HF will attack SiO2.
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