Question

temperatui water is 1.60 K. Calculate Δ1) and an Calculate Δ H2 for NO(g) at 975 K, assuming that the als P4.4 heat capacities of reactants and products are constant over the tie temperature interval at their values at 298.15 K. P4.5 The total surface area of the earth covered by ocean is cu 335 × 108 km2. Carbon is fixed in the oceans via photosyn- thesis performed by marine plants according to the reaction 6 CO2(g) + 6 H2O()CH1206(s) + 602(8). A lower range estimate of the mass of carbon fixed in the oceans is 44.5 metric tons/km2. Calculate the annual enthalpy change resulting from photosynthetic carbon fixation in the ocean given earlier. Assume P-1 bar and T= 298 K. P4.6 Derive a formula for Δ H2(T) for the reaction CO(g) + 1/2 02(3) CO2(8) assuming that the heat capacities of reactants and products do not change with temperature. P4.7 Given the data in Table 4.3 and the data tables, calcu- late the bond enthalpy and energy of the following a. The C-H bond in CH4 , b. The C-C single bond in C2H c. The C C double bond in C2H4 Use your result from part (a) to solve parts (b) and (c). P4.8 Use the following data at 298.15 K to complete this problem: k (kJ mol-1) 1/2H2(g) + I/202(g)-→ OH(g) H2(g) + 1/20-(g)-→ H2O(g) H2(g) 2 H(g) 02(g)-→ 20(g) 38.95 -241.814 435.994 498.34

Need help with 4.6

Answer 1

eo CD-t.toala)-→ co2.ca) eeeod formula Sor 4H i5