hello i was just trying this problem for my college class and its kinda hard. I got up to the last part, but I can't figure it out..
Impure nickel is refined by smelting sulfide ores through mond process: Ni (s) + 4CO (g) --> Ni(CO)4.
There's like 8 parts to this problem. Part h is the one I'm stuck on:
A recently developed variation of the mond process carries out the process at higher pressures and a temperature of 152 Celcius degrees. estimate the max. pressure of Ni(CO)4 (g) that can be attained before the gas liquefies at 152 C. the boiling point for Ni(CO)4 is 42 C degrees and the enthalpy of vaporization is 29.0 kJ/mol. Hint: Ni(CO)4 will liquefy when the pressure of Ni(CO)4 is greater than the K value.
I got -165 kJ as ¡âH and -405 as ¡âS; im pretty sure these are right. Using these and 425 K as temperature, I plugged these into this equation: ¡âG = ¡âH - T¡âS. I got 7.13 kJ/mol as ¡âG, so I put this in ¡âG = -RTlnK, now using 315 K as the temp. I got K as 0.0656, but Im not sure this is right cause I didn't use boiling pt or enthalpy of vap. to solve this, so i feel like im doing somethin wrong.
Any help/insght is greatly appreciated.. thanks. =]
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