October 2018 1 180 Report

H2(g) + I2(s) ---> 2HI(g) , ΔH = +26 kJ/mol HI

H2(g) + I2(g) ---> 2HI(g) , ΔH = - 5kJ/mol HI

Opierając się na powyższych danych oblicz entalpie sublimacji jodu.



H2(g) + I2(s) ---> 2HI(g) ΔH = 26 kJ/mol HI

2HI(g) ---> H2(g) + I2(g) ΔH = 5kJ/mol HI



I2(s) ---> I2(g) ΔH = ?



ΔH = 2*26 + 2*5

ΔH = 62kJ/mol

dlaczego mnożymy entalpie tych dwoch reakcji razy dwa ??


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