All categories

3 years ago

Which physical state of matter exhibits the greatest change in volume with changes or temperature or pressure?

1 answer:

6 0

<span>It’s the gas physical state that shows the greatest change in volume and changes in temperature or pressure. Because gas is the matter that is composed of loose particles but can be compressed. Since gas contains loose molecules, the molecules can freely move in a certain object, so when physical change happens, it exhibit greatest change. Gas also follow the shape of its container and can expand in order to fill its container. It has no definite volume or shape. </span>

You might be interested in

At 35°C, Kc = 1.6 multiplied by10-5 for the following reaction

Brums [2.3K]

Answer : The equilibrium concentrations of all species $NO,Cl_2\text{ and }NOCl$ are, 0.05 M, 0.043 M and 0.975 M respectively.

Explanation : Given,

Moles of $NO$ = 2 mole

Moles of $Cl_2$ = 1 mole

Volume of solution = 1 L

Initial concentration of $NO$ = 2 M

Initial concentration of $Cl_2$ = 1 M

The given balanced equilibrium reaction is,

$2NO(g)+Cl_2(g)\rightleftharpoons 2NOCl(g)$

Initial conc. 2 M 1 M 0

At eqm. conc. (2-2x) M (1-x) M (2x) M

The expression for equilibrium constant for this reaction will be,

$K_c=\frac{[NOCl]^2}{[NO]^2[Cl_2]}$

The $K_c$ for reverse reaction = $\frac{1}{1.6\times 10^{-5}}$

Now put all the given values in this expression, we get :

$\frac{1}{1.6\times 10^{-5}}=\frac{(2x)^2}{(2-2x)^2\times (1-x)}$

By solving the term 'x', we get :

x = 0.975

Thus, the concentrations of $NO,Cl_2\text{ and }NOCl$ at equilibrium are :

Concentration of $NO$ = (2-2x) M = (2 - 2 × 0.975) M = 0.05 M

Concentration of $Cl_2$ = (1-x) M = 1 - 0.975 = 0.043 M

Concentration of $NOCl$ = x M = 0.975 M

Therefore, the equilibrium concentrations of all species $NO,Cl_2\text{ and }NOCl$ are, 0.05 M, 0.043 M and 0.975 M respectively.

6 0

3 years ago

The half- life of actinium-228 is 6.13 hours What amount of a 70 milliqram sample remains after 24.52 hours?

Usimov [2.4K]

Answer:

4.375 milligram

Explanation:

Applying,

A = A'(2ᵃ/ⁿ)............. Equation 1

Where A = original amount of actinium-228, A' = amount of actinium-228 left after decay, a = Total time, n = half life

make A' the subject of the equation

A' = A/(2ᵃ/ⁿ)........... Equation 2

From the question,

Given: A = 70 milligram, a = 24.52 hours, n = 6.13 hours

Substitute these values into equation 2

A' = 70/(2²⁴°⁵²/⁶°¹³)

A' = 70/(2⁴)

A' = 70/16

A' = 4.375 milligram

4 0

3 years ago

Which electron transition involves the most energy

sertanlavr [38]

Delta E= R[1/n^2 (initial) - 1/n^2 (final) ]

so transition n=3 to n=1 will emit more energy

5 0

3 years ago

What are the gas laws? (Include Boyle's law, charles's law, gay lussac's law, an avogadro's law) Could someone please summarize

Rina8888 [55]

Answer:

Boyle's Law: When the pressure of a gas increases, the volume of the gas will decrease as long as the temperature and amount of gas are constant.

So basically pressure is inversely proportional to Volume, when one increases, the other decreases, vice versa.

Equation: $P_{1} V_{1} = P_{2} V_{2}$

Charles Law: When the temperature of a gas increases, the volume of a gas will also increase if the pressure and amount of gas are constant.

So basically Temperature and volume are directly proportional.

Equation: $\frac{V_{1}}{T_{1}} = \frac{V_{2} }{T_{2} }$

Gay Lussac's Law: When the temperature of a gas increases, the pressure of a gas also increases when volume and the amount of gas remain constant.

Basically, Temperature and Pressure are directly proportional.

Equation: $\frac{P_{1}}{T_{1}} = \frac{P_{2} }{T_{2} }$