Chemistry, 27.11.2019 01:31 rileyeddins1010

Write an equation for the combined gas law, using temperature in degrees celsius. explain why the kelvin scale is convenient.

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Answer from: Queenashley3232

The combined gas law

$\displaystyle \frac{P.V}{t+273}=k$

Further explanation

There are several gas equations in various processes:

1. Avogadro's hypothesis

In the same temperature and pressure, in the same volume conditions, the gas contains the same number of molecules

So it applies: the ratio of gas volume will be equal to the ratio of gas moles

V1: V2 = n1: n2 2. Boyle's Law

At a fixed temperature, the gas volume is inversely proportional to the pressure applied

p1.V1 = p2.V2 3. Charles's Law

When the gas pressure is kept constant, the gas volume is proportional to the temperature

V1 / T1 = V2 / T2 4. Gay Lussac's Law

When the volume is not changed, the gas pressure in the tube is proportional to its absolute temperature

P1 / T1 = P2 / T2 5. Law of Boyle-Gay-Lussac

Combined with Boyle's law and Gay Lussac's law

P1.V1 / T1 = P2.V2 / T2

P1 = initial gas pressure (N / m2 or Pa)

V1 = initial gas volume (m3)

P2 = gas end pressure

V2 = the final volume of gas

T1 = initial gas temperature (K)

T2 = gas end temperature

Can be concluded

Boyle's law at constant T, P = 1 / V ⇒PV = k

Charles's law, at constant P, V = T ⇒V/T = k

Gay Lussac's Law , constant V, P=T⇒P/T = k

Avogadro's law, at constant P and T, V = n

So an equation for the combined gas law :

$\large{\boxed{\bold{\frac{P.V}{T}=k}}$

$\large{\boxed{\bold{\frac{P.V}{t+273}=k}}$

Become the general ideal gas equation

PV = nRT

PV = NkT

N = number of gas particles

n = number of moles

R = gas constant (8,31.10³ J / kmole K

k = Boltzmann constant (1,38.10⁻²³)

n = = N / No

n = m / M

n = mole

No = Avogadro number (6.02.10²³)

m = mass

M = relative molecular mass

Absolute zero point of the Kelvin scale can better indicate the condition of a substance that has frozen, so the Kelvin scale is always positive and easy to calculate

Learn more

Which equation agrees with the ideal gas law

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Which law relates to the ideal gas law

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Keywords : ideal gas law,the combined gas law,Kelvin scale

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Write an equation for the combined gas law, using temperature in degrees celsius. explain why the ke...

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