The total surface area for the asia consisting of forest, cultivated land, grass land, and desert is approximately 4.46 x 107 km2. every year, the mass of carbon fixed by photosynthesis by vegetation covering this land surface according to reaction 6 co2(g) + 6h2o (l)  c6h12o6(s) + 6o2(g) is about 455 x 103 kg km-2. calculate the annual enthalpy change resulting from the photosynthetic carbon fixation over the land surface. assume 1 bar and 298 k.

Explanation:

We calculate the amount of carbon fixed as follows.

            = kg

= -1273.1 kJ/mol

= -393.5 kJ/mol

= -285.8 kJ/mol

Hence, total reaction will be as follows.

                           =

                           = 2802.7 kJ/mol

Therefore, calculate the number of moles of fixed carbon as follows.

                   =

                   =

Thus, we can conclude that the annual enthalpy change resulting from the photosynthetic carbon fixation over the land surface is .

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