Asked by please help
Before a trip from New York to Boston, the pressure in an automobile tire is 2.5 atm at 272 K. At the end of the trip, the pressure gauge reads 1.94 atm. What is the new Celsius temperature of the air inside the tire?
(Assume tires with constant volume.)
Answer in units of degrees C
(Assume tires with constant volume.)
Answer in units of degrees C
Answers
Answered by
DrBob222
(P1/T1) = (P2/T2)
Remember T must be in kelvin.
Remember T must be in kelvin.
Answered by
please help
i'm still not sure how to do this one. i've tried a couple of ways but it's been the wrong answer so far.
Answered by
DrBob222
Type your work.
Answered by
please help
this is one way i did it..
2.5/272=1.94/?
.009?=1.94
?=215.6
2.5/272=1.94/?
.009?=1.94
?=215.6
Answered by
DrBob222
Set up is right.
Algebra is ok except you rounded the 2.5/272 too much. Why did you throw the other numbers away?
2.5/272 = 0.00919 (I know that's too many places in my answer but I routinely carry one more than allowed, then round at the end). My best guess is that you are off just enough that 216 is not close enough.. By the way, if the 2.5 is the problem (and not 2.50) then 2 s.f. is all you are allowed.
As an extra note, I wouldn't believe this problem at all. When you drive from New York to Boston, the temperature goes UP in a tire and not down and pressure goes UP and not down.
Algebra is ok except you rounded the 2.5/272 too much. Why did you throw the other numbers away?
2.5/272 = 0.00919 (I know that's too many places in my answer but I routinely carry one more than allowed, then round at the end). My best guess is that you are off just enough that 216 is not close enough.. By the way, if the 2.5 is the problem (and not 2.50) then 2 s.f. is all you are allowed.
As an extra note, I wouldn't believe this problem at all. When you drive from New York to Boston, the temperature goes UP in a tire and not down and pressure goes UP and not down.
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