P. w seakins, m. j. pilling, l. t. niiranen, d. gutman, and l. n.krasnoperov (j. phys. chem. 96, 9847(1992)) measured the forward and reverse rate constants forthe gas-phase reactionc2h5 (g) + hbr (g) c2h6 (g)+ br (g)and used their findings to compute thermodynamic parametersfor c2h5. the reaction isbimolecular in both directions with arrhenius parameters a =1.0 109 dm3 mol-1 s-1,ea= -4.2 kj/mol for the foward reaction and k'=1.4 1011 dm3 mol-1 s-1,ea= 53.3 kj/mol for the reverse reaction. compute ∆fh7,s7m, and ∆fg7of c2h5at 298 k

14 days is the half-life of phosphorus-32

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

c

explanation: