12) diven the data on the final page, calculate AHºrn for 8NH) (8) + 1002 (8) 8NO(g) + 12H20 (). 13) The pressure o...

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Answer 1

Answer #1

12) 8NH3_(g) + 10 O2_(g) ----------> 8NO_(g) + 12 H2O _(l)

$\Delta$ H⁰_rxn = [8 $\Delta$ H⁰_f(NO) + 12 $\Delta$ H⁰_f(H2O)] - [8 $\Delta$ H⁰_f(NH3) + 10 $\Delta$ H⁰_f(O2) ]

$\Delta$ H⁰_rxn = [8(90.25) + 10 (-285.83)] - [8(-46.11) + 10(0)]

$\Delta$ H⁰_rxn = [722 - 2858.3] - [- 368.88]

$\Delta$ H⁰_rxn = - 1767 kJ

13) we have a relation

P1 /T1 = P2/T2

P1 = 219 bar , T1 = 13⁰C = 286 K

P2 = ? , T2 = 2⁰C = 275 K

P2 = (P1T2 / T1)

P2 = (219 x 275 / 286)

P2 = 210 bar

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Answer 2

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