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Helga [31]
3 years ago
12

A mixture of nitrogen and argon gas is compressed from a volume of 99.0L to a volume of 51.0L , while the pressure is held const

ant at 61.0atm . Calculate the work done on the gas mixture. Round your answer to 3 significant digits, and be sure it has the correct sign (positive or negative)
Chemistry
1 answer:
vitfil [10]3 years ago
5 0

Answer:

2,93x10³atmL, 2,97x10⁵J

Explanation:

The work done in gas compression under constant pressure is:

W = -P×ΔV

<em>Where W is work done, P is pressure and </em>ΔV <em>is change in volume (Vol.f - Vol.i)</em>

Replacing:

W = -61.0atm×(51.0L - 99.0L)

W = 2928atmL = <em>2,93x10³atmL</em>

In Joules:

2928atmL × (101,325J / 1atmL) = 296680J ≡<em> 2,97x10⁵J</em>

<em></em>

I hope it helps!

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Decreases

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Determine the resulting pH when 12mL if 0.16M HCl are reacted with 32 mL if 0.24M KOH.
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Answer:

pH = 13.1

Explanation:

Hello there!

In this case, according to the given information, we can set up the following equation:

HCl+KOH\rightarrow KCl+H_2O

Thus, since there is 1:1 mole ratio of HCl to KOH, we can find the reacting moles as follows:

n_{HCl}=0.012L*0.16mol/L=0.00192mol\\\\n_{KOH}=0.032L*0.24mol/L=0.00768mol

Thus, since there are less moles of HCl, we calculate the remaining moles of KOH as follows:

n_{KOH}=0.00768mol-0.00192mol=0.00576mol

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And the resulting pH is:

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3 0
3 years ago
A coal-burning power plant generates 8.53 × 1016 J per year. If the coal yields 36.0 kJ/g, how many grams of coal was burned eac
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The amount of coal burnt each year to produce 8.53 × 10¹⁶ Joule of energy is 2.3 x 10¹² gram.

<h3>What is Combustion?</h3>

Burning of coal in the presence of air is called combustion.

As according to the given question,

A coal-burning power plant generates 8.53 × 10¹⁶ Joule of energy in a year.

1 gram of coal yields generates 36 kilo joule (36000 Joule) energy.

Hence, to generate 8.53 × 10¹⁶ Joule of energy in a year, the weight of carbon burnt will be ;

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brainly.com/question/15117038

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