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zavuch27 [327]
3 years ago
12

Why melting and boiling points can be used as a way to check purity?​

Chemistry
1 answer:
jekas [21]3 years ago
6 0

Answer: Let's see why

Pure solid and liquid compounds possess sharp melting and boiling points. Therefore, melting and boiling points of a compound can be used as a criteria of purity. ... Sometimes during cooling minute quantity of the substance (solid which is being purified) is added to the solution to facilitate the initial crystallisation.

Explanation:

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the specific heat of the metallic element rhodium is 0.240 j/g-k at 25°c. if 586 j of heat is added to an 80.0 g block of rhodiu
andrey2020 [161]

The expected final temperature of the block, given that 586 J of heat were added to it is 55.5 °C

<h3>How to determine the final temeprature</h3>

We'll begin by obtaining the change in the temperature of the block. This can be obtained as follow:

  • Specific heat capacity of block (C) = 0.240 J/gºC
  • Heat added (Q) = 586 J
  • Mass of block (M) = 80.0 g
  • Change in temperature (ΔT) =?

Q = MCΔT

Divide both sides by MC

ΔT = Q / MC

ΔT = 586 / (80.0 × 0.240)

ΔT = 586 / 19.2

ΔT = 30.5 °C

Finally, we shall determine the final temperature of the block. This can be obtained as follow:

  • Initial temperature (T₁) = 25 °C
  • Change in temperature (ΔT) = 30.5 °C
  • Final temperature (T₂) = ?

ΔT = T₂ – T₁

30.5 = T₂ – 25

Collect like terms

T₂ = 30.5 + 25

T₂ = 55.5 °C

Thus, from the calculation made above, we can conclude that the final temperature is 55.5 °C

Learn more about heat transfer:

brainly.com/question/14383794

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Explanation:

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11cm+11.38cm+500.55cm=
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