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xeze [42]
3 years ago
15

Explain wHY does dissolving coffee in hot water become physical change

Chemistry
1 answer:
defon3 years ago
7 0
The coffee causes the water to change color
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If the statement is true, select True. If it is false, select False.
defon

Answer:

False, since boiling is a physical change of state. Although it is at 100°C, it is not a chemical property.

Explanation:

Hope this helped!

5 0
4 years ago
A solid white substance A is heated strongly in the absence of air. It decomposes to form a new white crystalline substance B an
attashe74 [19]

Answer:

A and B as well C are the compounds.

Explanation:

  • A seems to be a compound, very least, it appears to contain carbon and oxygen.
  • C seems to be a compound, containing respectively oxygen as well as carbon.
  • B isn't always described by that of the information provided, it is therefore presumably a compound because there are few components as white solid particles.

So that the above is the correct answer.

3 0
3 years ago
Calculate the standard entropy of vaporization of ethanol at its boiling point 285 K. The standard molar enthalpy of vaporizatio
Ivanshal [37]

Answer:

standard entropy of vaporization of ethanol = 142.105 J/K-mol

Explanation:

given data

enthalpy of vaporization of ethanol = 40.5 kJ/mol = 40.5 × 10^{3} J/mol

entropy of vaporization of ethanol boiling point = 285 K

to find out

standard entropy of vaporization of ethanol

solution

we get here standard entropy of vaporization of ethanol that is expess as

standard entropy of vaporization of ethanol ΔS = \frac{\Delta H}{T} .............1

here ΔH is enthalpy of vaporization of ethanol and  T is temperature

put value in equation 1

standard entropy of vaporization of ethanol ΔS =  \frac{40.5*10^3}{285}

standard entropy of vaporization of ethanol = 142.105 J/K-mol

3 0
4 years ago
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As you get closer to the boundary between two of the Earth's Plates what is most likely to happen to the intensity of the Earthq
Zigmanuir [339]
The Ring of fire most seismically and volcanically active zone in the world. 
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3 years ago
In an ecosystem, which of the following is NOT an abiotic factor
Oksana_A [137]
Algae is not an abiotic factor.

4 0
3 years ago
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