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alexira [117]
3 years ago
14

In nuclear reactions, the amount of matter and energy of the reactants has to equal the amount of matter and energy of the produ

cts.
TRUE
FALSE
Chemistry
2 answers:
Genrish500 [490]3 years ago
7 0
Yes/true, the amount of matter and energy HAS to equal the amount of matter and energy of the products.
jeyben [28]3 years ago
5 0
True. law of conservation of matter and energy
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Answer:

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Explanation:

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the heat of fusion of acetone is 5.7 kJ/mol. Calculate to two significant figures the entropy change when 6.3 mol of acetone mel
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<u>Answer:</u> The entropy change of the process is 2.0\times 10^2J/K

<u>Explanation:</u>

To calculate the entropy change for different phase at same temperature, we use the equation:

\Delta S=n\times \frac{\Delta H_{f}}{T}

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\Delta H_{f} = enthalpy of fusion = 5.7 kJ/mol = 5700 J/mol    (Conversion factor:  1 kJ = 1000 J)

T = temperature of the system = -94.7^oC=[273-94.7]=178.3K

Putting values in above equation, we get:

\Delta S=\frac{6.3mol\times 5700J/mol}{178.3K}\\\\\Delta S=201.4J/K=2.0\times 10^2J/K

Hence, the entropy change of the process is 2.0\times 10^2J/K

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The process of passing electricity through water to chemically separate it into hydrogen and oxygen is called what?
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