Question

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Convert the following temperatures to the Celsius scale .
a) 293 k
b) 470 k

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Convert the following temperatures into Kelvin scale .
a) 25°C
b) 373°C

Answer 1

⌬ In order to answer this questions you should know -

Conversion of temperature from Kelvin to Celsius scale -

(T - 273)

For example-

→ 278 k to °C

→ 278 - 273 = 05°C

Conversion of temperature from Celsius to Kelvin scale -

( T + 273 )

→ 12 °C to k

→ 12°C + 273 = 285 k

$\rule{200}2$

Convert the following temperatures to the Celsius scale .

a) 293 K

⠀

⠀

$\begin{gathered}\twoheadrightarrow\sf 293 - 273 \\\\\\\end{gathered}$

$\begin{gathered}\twoheadrightarrow\underline{\boxed{\pmb{\sf{ 20 \degree C}}}}\\\\\end{gathered}$

b) 470 K

⠀

⠀

$\begin{gathered}\twoheadrightarrow\sf 470 - 273 \\\\\\\end{gathered}$

$\begin{gathered}\twoheadrightarrow\underline{\boxed{\pmb{\sf{ 197 \degree C}}}}\\\\\end{gathered}$

$\rule{200}2$

Convert the following temperatures into Kelvin scale .

a) 25°C

⠀

⠀

$\begin{gathered}\twoheadrightarrow\sf 25 + 273 \\\\\\\end{gathered}$

$\begin{gathered}\twoheadrightarrow\underline{\boxed{\pmb{\sf{ 298 \; K}}}}\\\\\end{gathered}$

b) 373°C

⠀

⠀

$\begin{gathered}\twoheadrightarrow\sf 373 + 273 \\\\\\\end{gathered}$

$\begin{gathered}\twoheadrightarrow\underline{\boxed{\pmb{\sf{ 646 \; K}}}}\\\\\end{gathered}$

Answer 2

Answer:

⋆ We are asked to convert the following temperatures to the Celsius scale.

• 293 Kelvin and 470 Kelvin

We have to use the below mentioned formula to solve this question:

• ${\small{\underline{\boxed{\pmb{\sf{Celcius \: = Kelvin \: - 273^{\circ}}}}}}}$

a) 293 Kelvin

${\sf{:\implies Celcius \: = Kelvin \: - 273^{\circ}}}$

${\sf{:\implies Celcius \: = 293 \: - 273^{\circ}}}$

${\sf{:\implies Celcius \: = 20^{\circ}}}$

${\pmb{\sf{Henceforth, \: converted!}}}$

b) 470 Kelvin

${\sf{:\implies Celcius \: = Kelvin \: - 273^{\circ}}}$

${\sf{:\implies Celcius \: = 470 \: - 273^{\circ}}}$

${\sf{:\implies Celcius \: = 197^{\circ}}}$

${\pmb{\sf{Henceforth, \: converted!}}}$

__________________________

⋆ Now we are asked to convert the following into Kelvin scale from Celsius scale.

• 25°C and 373°C

We have to use the following formula to solve this question:

• ${\small{\underline{\boxed{\pmb{\sf{Kelvin \: = Celcius \: + 273^{\circ}}}}}}}$

a) 25°C

${\sf{:\implies Kelvin \: = Celcius \: + 273^{\circ}}}$

${\sf{:\implies Kelvin \: = 25 \: + 273^{\circ}}}$

${\sf{:\implies Kelvin \: = 298^{\circ}}}$

${\pmb{\sf{Henceforth, \: converted!}}}$

b) 373°C

${\sf{:\implies Kelvin \: = Celcius \: + 273^{\circ}}}$

${\sf{:\implies Kelvin \: = 373 \: + 273^{\circ}}}$

${\sf{:\implies Kelvin \: = 646^{\circ}}}$

${\pmb{\sf{Henceforth, \: converted!}}}$

__________________________

Additional information:

→ The international system (SI) unit of temperature is Kelvin! 0°C = 273.16 Kelvin but for convenience we are taking it as approx 0°C = 273 Kelvin.

Learn more:

$\begin{gathered}\boxed{\begin {array}{c|c|c|c}\sf Temperature \:Scale &\sf Ice\:point &\sf Steam \;point &\sf No\;of\:division\:on\:Fundamental\;interval \\ \frac {\qquad\qquad\qquad}{} &\frac{\qquad\qquad\qquad}{} & \frac {\qquad\qquad\qquad}{} & \frac {\qquad\qquad\qquad\qquad\qquad\qquad}{} \\ \sf Celsius\;scale & \sf0^\circ C &\sf100^\circ C &\sf 100\\&&&\\ \sf Fahrenheit\:scale & \sf32^\circ F &\sf 212^\circ F &\sf180 \\&&&\\ \sf Kelvin\;scale &\sf273K &\sf373K & \sf100\\&&&\\ \sf Reaumer \:scale &\sf0^\circ R &\sf80^\circ R &\sf80\end {array}}\end{gathered}$

More information:

Two properties of a substance to check that substance purity is given below:

1st property = Melting point.

2nd property = Boiling point.

Melting point = The temperature at which solid and the liquid forms of the substance exist at equilibrium or both forms have same vapour pressure is called melting point.

Boiling point = The temperature at which the vapour pressure of the liquid is equal to atmospheric pressure is called boiling point.

• Boiling point for Water is 373 K

• Boiling point for Ethanol is 349 K

• Boiling point for Chlroform is 334 K

• Boiling point for Acetone is 329 K