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Murrr4er [49]
3 years ago
6

Determine the average rate of decomposition of h3po4 between 10.0 and 40.0 s. express your answer with the appropriate units.

Chemistry
1 answer:
nirvana33 [79]3 years ago
8 0
Assume that we have this reaction 2H3PO4⇒ P2O5 + 3H2O
and when the rate of reaction is the speed at which the reactants can be changed and are converted into products So, according to our balanced reaction:

The rate of reaction = rate of formation of P2O5 
and the rate of this reaction also = 0.5 rates of decomposition of H3PO4 
∴ the rate of decomposition of H3PO4 = 2 rates of formation of P2O5
So when the rate of formation P2O5 = 2 x 10^-4 M/s 
So the rate of decomposition of H3PO4 = 2 x 2 x 10^-4
                                                                    = 4 x 10^-4 M/s


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Answer:

The equilibrium temperature of the water is 26.7 °C

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<u>Step 1:</u> Data given

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<u>Step 2:</u> Calculate final temperature

Qlost = -Qgained

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Q =m*c*ΔT

Q = m(quartz)*c(quartz)*ΔT(quartz) = -m(water) * c(water) * ΔT(water)

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⇒ c(quartz) = the specific heat capacity of quartz = 0.730 J/g°C

⇒ ΔT(quartz) = The change of temperature of the sample = T2 -88.6 °C

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35.04(T2-88.6) = -1255.2 (T2-25)

35.04T2 -3104.544 = -1255.2T2 + 31380

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T2 = 26.7 °C

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