Question

more Thermodynamics. @Photon336
http://i.imgur.com/Mg5hxlu.png

Answer 1

@Photon336

Answer 2

So look at the units


\[16.5~grams~H_{2}O\]

\[H_{v} = 2260 \frac{ J }{ g }\]


all you would need to do is multiply them out:

Hv*(# of grams)

Answer 3

if you multiply them together you end up getting joules the unit you want.

Answer 4

Oooh...so is the equation 2260 J/g the formula and I have to plug in the numbers after converting them to the right units if need be? So do I set it up like : \[2260 \times \frac{ 1 J}{ 16.5} = 136.97\]

Answer 5

@Photon336

Answer 6

Let me show you

Answer 7

Okay. @Photon336

Answer 8

You set it up like this. If you notice grams cancel out exactly as we want and were left with joules.

2260 (j/g) * 136g = joules

Answer 9

Where did the 136 come from?

Answer 10

I found it with my other formula...but that was my answer so I'm not exactly sure how you found it....

Answer 11

@Photon336 is it 37290J?

Answer 12

\[Hv=\frac{ Work }{ Mass }\] so you simply rearrange for work which is what you want and your're already given the value for Hv and Mass.

Answer 13

How do I find the work?

Answer 14

You rearrange the equation I wrote above to \[Work=Hv \times Mass=(2260 j/g) \times (16.5 g)\]

Answer 15

So is the work 37290? @ohernand

Answer 16

Yes, that is the correct answer.

Answer 17

Yay! Thank you so much!

Answer 18

No problem