4estimate the equilibrium composition at 400k and 1 atm of the following gaseous reactions: n-c5h12(g)  iso-c5h12(g) & n-c5h12(g)  neo-c5h12(g). standard gibbs energy of formation data for n-pentane (1), isopentane (2), and neopentane (3) at 400k are 40.195, 34.413, and 37.640 kj/mol, respectively. assume ideal-gas behavior.

At a certain temperature the rate of this reaction is first order in hi with a rate constant of : 0.0632s2hig=h2g+i2g suppose a vessel contains hi at a concentration of 1.28m . calculate how long it takes for the concentration of hi to decrease to 17.0% of its initial value. you may assume no other reaction is important. round your answer to 2 significant digits.