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2 years ago

Why do real gases deviate from gas laws

Chemistry

1 answer:

frosja888 [35]2 years ago

5 0

Answer:

Attractions between molecules cause a reduction in volume

Explanation:

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Three kilograms of steam is contained in a horizontal, frictionless piston and the cylinder is heated at a constant pressure of

lakkis [162]

Answer:

Final temperature: 659.8ºC

Expansion work: 3*75=225 kJ

Internal energy change: 275 kJ

Explanation:

First, considering both initial and final states, write the energy balance:

$U_{2}-U_{1}=Q-W$

Q is the only variable known. To determine the work, it is possible to consider the reversible process; the work done on a expansion reversible process may be calculated as:

$dw=Pdv$

The pressure is constant, so: $w=P(v_{2}-v_{1} )=0.5*100*1.5=75\frac{kJ}{kg}$ (There is a multiplication by 100 due to the conversion of bar to kPa)

So, the internal energy change may be calculated from the energy balance (don't forget to multiply by the mass):

$U_{2}-U_{1}=500-(3*75)=275kJ$

On the other hand, due to the low pressure the ideal gas law may be appropriate. The ideal gas law is written for both states:

$P_{1}V_{1}=nRT_{1}$

$P_{2}V_{2}=nRT_{2}\\V_{2}=2.5V_{1}\\P_{2}=P_{1}\\2.5P_{1}V_{1}=nRT_{2}$

Subtracting the first from the second:

$1.5P_{1}V_{1}=nR(T_{2}-T_{1})$

Isolating $T_{2}$ :

$T_{2}=T_{1}+\frac{1.5P_{1}V_{1}}{nR}$

Assuming that it is water steam, n=0.1666 kmol

$V_{1}=\frac{nRT_{1}}{P_{1}}=\frac{8.314*0.1666*373.15}{500} =1.034m^{3}$

$T_{2}=100+\frac{1.5*500*1.034}{0.1666*8.314}=659.76$ ºC

7 0

3 years ago

Summarize the five points of Dalton’s atomic theory, and explain at least one change that occurred to the atomic theory because

Umnica [9.8K]

The postulates of Dalton's theory were:
1) Elements are made of extremely small particles called atoms
2) <span>Atoms of a given element are identical in size, mass, and other properties
</span>3) <span>Atoms cannot be subdivided, created, or destroyed</span>
4) Atoms combine in whole number ratio to form compounds
5) Chemical reactions are the rearrangement of atoms
The third postulate has been disproved by modern science, in which the atom has been split and been subdivided into smaller parts such as the neutron, proton and electron, which are further subdivided into quarks, gluons, and kaons.
The second postulate was also disproved upon the discovery of isotopes.

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3 years ago

Read 2 more answers

True Lines...!!!!!<br>.<br>.<br>What is photosynthesis???

lbvjy [14]

Answer:

<h3><em>The process in which green plants prepare their food in their body by using minerals and carbon dioxide in the presence of sunlight .</em></h3><h3 /><h3 /><h3><em>Hope</em><em> it</em><em> </em><em>is </em><em>helpful</em><em> to</em><em> you</em><em> </em></h3><h3 />

5 0

3 years ago

Jane set up an experiment with 7 types of dog food and 15 dogs. Each day she fed a different brand of dog food to the 15 dogs. H

bixtya [17]

Answer:

I believe it's either D or A I did it in my math

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2 years ago

PLEASE HELP! ASAP PLEASE :) Which of the following is not an example of Newton’s third law? A) All of these are examples of Newt

gavmur [86]

Newton's third law states that every action has an equal and opposite reaction. The action and reaction forces are pairs of opposing forces.

In the given examples all three obey Newton's third law.

B) Action force: John pulls the door handle

Reaction: door handle gets pulled

C) Action force: Tire pushes on road

Reaction: The road pushes on the tire, vehicle moves

D) Action force: Exhaust pushes out of a rocket

Reaction: Rocket is pushed forward

Ans A) All these are examples of Newtons third law

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3 years ago