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snow_lady [41]
3 years ago
12

A system releases 481 kJ of heat while 390 kJ of work is done on the system. What is the change in internal

Chemistry
1 answer:
rosijanka [135]3 years ago
7 0

Answer:

ΔE = q + w

here q = -136 kj

w = 146

so  ΔE = -136 + 146 = 10 kj

thus internal energy of system increases by 10 kj...

I hope this helps! :) I don't know if it's the right one

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3 years ago
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Aliun [14]
<span>In order to solve this problem you must first make sure all your numbers are in like terms. From the density value you can see that it is grams per liter. The first conversion you must do in convert the 125.0 mL value to Liters which you would do by dividing by 1000 because 1 liter is equal to 1000 mL. 125.0 divided by 1000 is 0.125 Liter. Now you will use the density equation to solve. The density equation is density is equal to mass divided by volume. Plug in your known numbers for density and volume. Then solve for mass. So Density (1.269 g/l is equal to mass divided by volume (.125 Liter) You must rearrange the equation to multiple density by volume which is 1.269 times 0.125 which will give you 0.1586. Because the Liters cancel each other out, the answer's unit will be grams. Your final answer is 0.1586 grams.</span>
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3 years ago
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