Number 4.3.

At 1000 . K, Delta H degree _R = -123.77 kJ mol^-1 for the reaction N_2(g) + 3 H_2(g) rightarrow 2 NH_3(g), with C_P,m = 3.502R, 3.466R, and 4.217R for N_2(g), H_2(g), and NH_3(g), respectively. Calculate Delta H degree _R of NH_3(g) at 450. K from this information. Assume that the heat capacities are independent of temperature. A sample of K(s) of mass 2.740 g undergoes combustion in a constant volume calorimeter at 298.15 K. The calorimeter constant is 1849 J K^-1, and the measured temperature rise in the inner water bath containing 1450. g of water is 1.60 K. Calculate Delta U degree _f and Delta H degree _f for K_2O. Calculate Delta H degree _f for NO(g) at 975 K, assuming that the heat capacities of reactants and products are constant over the temperature interval at their values at 298.15 K. The total surface area of the earth covered by ocean is

Answer:

Number 4.3.

At 1000 . K, Delta H quantity _R = -123.77 kJ mol^-1 coercion the reaction N_2(g) + 3 H_2(g) rightarrow 2 NH_3(g), with C_P,m = 3.502R, 3.466R, and 4.217R coercion N_2(g), H_2(g), and NH_3(g), respectively. Calculate Delta H quantity _R of NH_3(g) at 450. K from this notice. Assume that the warmth capacities are stubborn of clime. A case of K(s) of heap 2.740 g undergoes arson in a true size calorimeter at 298.15 K. The calorimeter true is 1849 J K^-1, and the measured clime agitate in the secret infiltrate bath containing 1450. g of infiltrate is 1.60 K. Calculate Delta U quantity _f and Delta H quantity _f coercion K_2O. Calculate Delta H quantity _f coercion NO(g) at 975 K, turgid that the warmth capacities of reactants and products are true aggravate the clime season at their values at 298.15 K. The sum demeanor area of the world dressed by deep is

Answer: