Use Hess's law to determine Ofor the reaction → CO2(g),given that C(graphite) +202(8) — CO(8) A Hº = -110.54 kJ mol C(g...

Question

Question

Use Hesss law to determine Ofor the reaction → CO2(g),given that C(graphite) +202(8) — CO(8) A Hº = -110.54 kJ mol C(graphit

Answer 1

Answer #1

Ans :

To determine the $\Delta _{r}H^{o}$ for the desired reaction , we subtract reaction 1 from reaction 2.

So using the Hess's law , the $\Delta _{r}H^{o}$ for the reaction is given as :

= -393.51 KJ mol - (-110.54 KJ mol)

= -282.97 KJ mol

so the $\Delta _{r}H^{o}$ of the reaction mentioned is -282.97 KJ mol.

Answer 2

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