Question

Students in Mr. Klein’s chemistry class are conducting an experiment to calculate the specific heat of a copper sample. Mr. Klein requires each lab team to repeat the experiment until their percent error is 2% or less. Percent error is calculated using observed values (those students calculate from their lab results) and the true value (the accepted value based on reference). The formula for percent error is:(observed – true) x 100 true If the accepted value for the specific heat of copper is 0.385 J/g°C, which of the following lab teams have an unresolved problem on their hands?
a.
team 1: calculates 0.392 J/gºC
b.
team 2: calculates 0.395 J/gºC
c.
both teams
d.
neither team

Answer 1

As of right now i know for sure its not A or C.

Answer 2

use the formula to test both possibilities:

percent error = \(\dfrac{observed – true}{true} * 100\)

Team1 1: percent error = \(\dfrac{| 0.392– 0.385|}{0.385} * 100\%=1.82\%\)

So team 1 is good, their percent error is less than 2%.

Now do team 2.

(by the way, the formula you were given is wrong.)

Answer 3

thank you aaronq

Answer 4

no problem, dude!

Answer 5

If I did this right team 2 should of came around 2.60% making them having a problem.

Answer 6

thats correct \(\checkmark\)

Answer 7

thank you once again

Answer 8

no worries!