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 measure _R = -123.77 kJ mol^-1 restraint 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 restraint N_2(g), H_2(g), and NH_3(g), respectively. Calculate Delta H measure _R of NH_3(g) at 450. K from this notification. Assume that the ardor capacities are rebellious of sphere. A exemplification of K(s) of heap 2.740 g undergoes combustion in a trustworthy bulk calorimeter at 298.15 K. The calorimeter trustworthy is 1849 J K^-1, and the measured sphere ascend in the close impart bath containing 1450. g of impart is 1.60 K. Calculate Delta U measure _f and Delta H measure _f restraint K_2O. Calculate Delta H measure _f restraint NO(g) at 975 K, sumptuous that the ardor capacities of reactants and products are trustworthy aggravate the sphere space-between at their values at 298.15 K. The entirety manner area of the world tried by sea is

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