Units: Joules vs kJ

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Hai-Lin Yeh 1J
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Units: Joules vs kJ

Postby Hai-Lin Yeh 1J » Tue Jan 29, 2019 4:54 pm

What is the common preference for the units for ΔHvap, ΔHfus, ΔHsub? Is it joules or kilojoules? Because in problem 8.37, the answer is in kilojoules, but would we be incorrect if we answered in joules?

kamalkolluri
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Re: Units: Joules vs kJ

Postby kamalkolluri » Tue Jan 29, 2019 5:05 pm

You should be consistent with units. If they say kJ in the problem, use kJ if they say J then use J. I think it will be specified in problems on the test though.

Kevin Tang 4L
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Joined: Fri Sep 28, 2018 12:28 am

Re: Units: Joules vs kJ

Postby Kevin Tang 4L » Tue Jan 29, 2019 5:26 pm

They shouldn't take off points if you use kJ unless they specifically say to use joules. But it is important to keep in mind that joules is the SI unit for energy.

Yiting_Gong_4L
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Re: Units: Joules vs kJ

Postby Yiting_Gong_4L » Wed Jan 30, 2019 12:21 am

As long as you follow the units in the question you should be fine!

Saman Andalib 1H
Posts: 73
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Re: Units: Joules vs kJ

Postby Saman Andalib 1H » Wed Jan 30, 2019 1:21 am

I don't think it should really matter, but for safety, I would be consistent with the units that were presented initially in the problem.

Selina Bellin 2B
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Joined: Fri Sep 28, 2018 12:25 am

Re: Units: Joules vs kJ

Postby Selina Bellin 2B » Wed Jan 30, 2019 1:56 am

just be consistent and follow the question's units


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