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3 years ago

What is potential energy? Give an example please.

Chemistry

1 answer:

FromTheMoon [43]3 years ago

6 0

Answer:

Potential energy can be defined as the energy in a body due to its position

In simple terms potential energy is the energy at rest

Explanation: Examples ;

A spring has more potential energy when it is compressed or stretched.

A steel ball has more potential energy raised above the ground than it has after falling to Earth.

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Una muestra de oxígeno ocupa 4.2 litros a 760 mm de hg . ¿ cual será el volumen del oxigeno a 415 mm de hg , si la temperatura p

ddd [48]

Teniendo en cuenta la ley de Boyle, el volumen del oxigeno a 415 mmHg, si la temperatura permanece constante, es 7,69 L.

Al aumentar el volumen, las partículas (átomos o moléculas) del gas tardan más en llegar a las paredes del recipiente y por lo tanto chocan menos veces por unidad de tiempo contra ellas. Esto significa que la presión será menor porque ésta representa la frecuencia de choques del gas contra las paredes.

De esta manera se relaciona la presión y el volumen, determinando la ley de Boyle que dice:

“El volumen ocupado por una determinada masa gaseosa a temperatura constante, es inversamente proporcional a la presión”

La ley de Boyle se expresa matemáticamente como:

P×V=k

Teniendo un estado inicial 1 y final 2, se cumple:

P₁×V₁= P₂×V₂

En este caso, se sabe que:

P₁= 760 mmHg
V₁= 4.2 L
P₂= 415 mmHg
V₂= ?

Reemplazando en la expresión matemática para la Ley de Boyle:

760 mmHg× 4.2 L= 415 mmHg× V₂

Resolviendo:

(760 mmHg× 4.2 L)÷ 415 mmHg= V₂

7,69 L= V₂

Finalmente, el volumen del oxigeno a 415 mmHg, si la temperatura permanece constante, es 7,69 L.

Aprende más:

5 0

2 years ago

How many moles are in 5g of Al? A.0.185 B.18.5 C.5.4 D.135

Lapatulllka [165]

I got 134.91 but if you round it you’ll get 135

3 0

3 years ago

Read 2 more answers

What is the Kelvin temperature of the air in a tire if the pressure inside the tire is 188 kPa at 32°C. While driving under peri

DENIUS [597]

Answer:

414K

Explanation:

The question is not completely clear because some missing parts or grammar (syntax) errors.

Interpreting it, the question is what is the Kelvin temperatue of the air in a tire, when the pressure in the tire has increased to 225 kPa, if the initial conditions of the air inside the tire were 188kPa of pressure and a temperature of 32ºC.

To solve this, you can assume constant volume and use the law of Gay-Lussac for ideal gases:

$\dfrac{P_1}{T_{1}}=\dfrac{P_2}{T_2}$

That equation works with absolute temperatures, i.e. Kelvin.

32ºC = 32 + 273.15 K = 305.15K

Then solve for T₂, substitute and compute:

$T_2=P_2\times \dfrac{T_1}{P_{1}}=225kPa\times \dfrac{305.15K}{188kPa}$

$T_2=413.90K\approx 414K\longleftarrow answer$

8 0

3 years ago

Draw the structures for the following compounds: 2-methylpropane

-Dominant- [34]

Answer:

Structure of 2-methylpropane.

Explanation:

The given compound is 2-methyl propane.

Propane has three carbons in their parent chain and all are bonded by a single bond.

And the second carbon has methyl group.

The structure of 2- methyl propane is as follows.

8 0

3 years ago

- How many moles of HCl will be needed to neutralize 200.0 ml of a 2.5 M NaOH solution?

dalvyx [7]

Answer:

0.5 mol HCl

Explanation:

2.5 mol/L *0.200 L = 0.5 mol NaOH

NaOH + HCl ---> NaCl + H2O

from reaction 1 mol 1 mol

given 0.5mol x mol

x= 0.5*1/1= 0.5 mol HCl

4 0

3 years ago