8.] HgS occurs in two crystalline forms called "red" and "black". For the conversion of the red form to the black form at 525 °C, 4Gº = -0.157 kJ mol-¹ and AH = 4.184 kJ mol-¹ Assuming the AH° is temperature independent, find the temperature at which the two forms can coexist at equilibrium at 1.000 bar. Which is more stable above this temperature?

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Chapter16: Spontaneity Of Reaction
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A] HgS occurs in two crystalline forms called "red" and "black". For the conversion of
8. L-
the red form to the black form at 525 °C, 4Gº = -0.157 kJ mol-¹ and AH = 4.184 kJ mol-¹.
Assuming the AH is temperature independent, find the temperature at which the two forms can
coexist at equilibrium at 1.000 bar. Which is more stable above this temperature?
Transcribed Image Text:A] HgS occurs in two crystalline forms called "red" and "black". For the conversion of 8. L- the red form to the black form at 525 °C, 4Gº = -0.157 kJ mol-¹ and AH = 4.184 kJ mol-¹. Assuming the AH is temperature independent, find the temperature at which the two forms can coexist at equilibrium at 1.000 bar. Which is more stable above this temperature?
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