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Stella [2.4K]
3 years ago
10

When salt dissolved in water, what type of change occurs?

Chemistry
2 answers:
hoa [83]3 years ago
6 0
A physical ,because it’s natural and can get it from the earth
Ira Lisetskai [31]3 years ago
4 0

A chemical change occurs. Nothing is physically doing anything to the salt because it is dissolving itself.  Any ionic compound that is soluble in water would experience a chemical change.

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What is the time difference in mean solar time between 30° N 75° W and 30° N 90° W?

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Correct forms of the equation of Charles’s law is (are)
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3 years ago
Which answer below correctly identifies the type of change and the explanation for the boiling of water?
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7 0
3 years ago
Read 2 more answers
1 C8H10(l) +21/2O2(g) → 8CO2(g) + 5H2O(g), Hcomb= ? Hf for C8H10(l) = +49.0kJ/mol C8H10(l) Use the balanced combustion reaction
nikklg [1K]

Answer:

H_{comb}=-4406kJ/mol

Explanation:

Hello,

In this case, the enthalpy of combustion is understood as the energy released when one mole of fuel, in this case octene, is burned in the presence of oxygen and is computed with the enthalpies of formation of the fuel, carbon dioxide and water as shown below (oxygen is circumvented as it is a pure element):

H_{comb}=8*\Delta _fH_{CO_2}+5\Delta _fH_{H_2O}-\Delta _fH_{C_8H_{10}}

Thus, since we already know the enthalpy of combustion of the fuel, for carbon and water we have -393.5 and -241.8 kJ/mol respectively, thereby, the enthalpy of combustion turns out:

H_{comb}=8*(-393.5kJ/mol)+5(-241.8kJ/mol)-49.0kJ/mol\\\\H_{comb}=-4406kJ/mol

Best regards.

4 0
3 years ago
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