A series of dialkyl ethers was allowed to react with excess hydrogen bromide, with the following results. Identify the ether in each case.
(a) One ether gave a mixture of bromocyclopentane and 1-bromobutane.
(b) Another ether gave only benzyl bromide

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.