Chapter five (chm 140 bl 14e)
problem 5.84
8 of 9
review | constants | periodic table
use bond enthalpies in the table below to estimate δh for each of the following reactions

.
average bond enthalpies (kj/mol)
c−h413 n−h391 o−h463 f−f155
c−c348 n−n163 o−o146
c=c614 n−o201 o=o495 cl−f253
c−n293 n−f272 o−f190 cl−cl242
c−o358 n−cl200 o−cl203 br−f237
c=o799 n−br243 o−i234 br−cl218
c−f485 h−h436 br−br193
c−cl328 h−f567
c−br276 h−cl431 i−cl208
c−i240 h−br366 i−br175
h−i299 i−i151
part a
chbr3 plus cl2 goes to cclbr3 plus hcl.

express your answer in kilojoules to 3 significant figures.

Brad and his family like to go camping. they always take a gas lantern with them. the lantern can take fiuels but always puts out the same amount of light. brad has two different kinds of fuel for the lantern. how can he figure out which kind of fuel has more chemical energy that the lantern can turn into light? measure the brightness of the lantern using each kind of fuel by comparing it to the full moon. g measure the volume of the containers of fuel. measure how long the lantern stays lit on a fixed amount of fuel. measure the mass of each container of fuel using a balance scale. answer 12

Using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 pb+2(aq) + 2cl -(aq). if the value of ksp was determined to be only 1.2 x 10-2: too much solid has dissolved. additional precipitate is forming. the solution is unsaturated. the ions are now combining to reduce their concentrations.

All of the following are homogeneous mixtures except a) sugar dissolved in water. b) orange juice. c) coffee with cream. d) household vinegar. e) apple juice