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3 years ago

What are the criteria for the spontaneity of chemical reactions

Chemistry

1 answer:

iogann1982 [59]3 years ago

3 0

Answer:

For a spontaneous reaction to occur there must be work done to the system. This may be agitation with heat or by mixing the sample. Another way is by the system not being in an equilibrium state, it will react until it reaches equilibrium.

Hope this helps

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(Numerical problems) A car is running with the velocity of 72km/h. What will be it's velocity after 5s if it's acceleration is -

kodGreya [7K]

The car's velocity after 5s : 10 m/s

<h3>Further explanation</h3>

Given

velocity=v=72 km/h=20 m/s

time=t = 5 s

acceleration=a = -2 m/s²

Required

velocity after 5s

Solution

Straight motion changes with constant acceleration

$\tt v_f=v_i+at$

vf=final velocity

vi = initial velocity

Input the value :

$\tt v_f=20+(-2).5\\\\v_f=20-10\\\\v_f=10~m/s$

The car is decelerating (acceleration is negative) so that its speed decreases

4 0

3 years ago

For which compound does 0.256 mole weigh 12.8 g?

mylen [45]

Number of moles = $\frac{mass (g)}{Molar mass}$
so to calculate molar mass (Molecular weight of compound):
Molecular weight = $\frac{mass (g)}{number of moles}$
= $\frac{12.8 g}{0.256 mole}$ = 50 g / mole
Now we calculate molecular weight of each compound in choices:
a) C₂H₄O = 44
b) CO₂ = 44
c) CH₃Cl = 50.4 ALMOST 50 so this is the correct answer
d) C₂H₆ = 30

6 0

3 years ago

1. A dry, empty bottle is placed in an ice bath. After the air inside the bottle is cooled off, a balloon is placed

Alex777 [14]

Answer:

hot air rises and expanded the balloon

Explanation:

thats it.

8 0

3 years ago

Read 2 more answers

Which reactions are exothermic?

poizon [28]

Answer:

Explanation:

exothermic reactions are the reactions which involve the release of energy.

the energy released can be of any forms ,for example heat,light .

all the combustion reactions are exothermic reactions

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3 years ago

The picture below shows Enchanted Rock, a pink granite rock formation located in the Llano Uplift ecoregion. This land is most l

Katyanochek1 [597]

Answer:

what are the answers?

Explanation:

Probably going to be c for this, until the answers you choose are shown. very very sorry :c

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2 years ago

What are the criteria for the spontaneity of chemical reactions​

What are the criteria for the spontaneity of chemical reactions