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pochemuha
2 years ago
10

What is the percent yield if the quantity of reactants is sufficient to produce 0.86g of

Chemistry
1 answer:
Juliette [100K]2 years ago
8 0

Taking into account definition of percent yield, the percent yield for the reaction is 82.56%.

<h3>Definition of percent yield</h3>

The percent yield is the ratio of the actual return to the theoretical return expressed as a percentage.

The percent yield is calculated as the experimental yield divided by the theoretical yield multiplied by 100%:

percent yield= \frac{actual yield}{theorical yield}x100

where the theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.

Percent yield for the reaction in this case

In this case, you know:

  • actual yield= 0.71 grams
  • theorical yield= 0.86 grams

Replacing in the definition of percent yields:

percent yield= \frac{0.71 g}{0.86 g}x100

Solving:

<u><em>percent yield= 82.56%</em></u>

Finally, the percent yield for the reaction is 82.56%.

Learn more about percent yield:

brainly.com/question/14408642

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A scientist measures the standard enthalpy change for the following reaction to be 81.1 kJ :2CO2(g) + 5 H2(g)C2H2(g) + 4 H2O(g)B
posledela

<u>Answer:</u> The enthalpy of the formation of CO_2(g) is coming out to be -410.8 kJ/mol.Z

<u>Explanation:</u>

Enthalpy change is defined as the difference in enthalpies of all the product and the reactants each multiplied with their respective number of moles. It is represented as \Delta H^o

The equation used to calculate enthalpy change is of a reaction is:  

\Delta H^o_{rxn}=\sum [n\times \Delta H^o_f(product)]-\sum [n\times \Delta H^o_f(reactant)]

For the given chemical reaction:

2CO_2(g)+5H_2(g)\rightarrow C_2H_2(g)+4H_2O(g)

The equation for the enthalpy change of the above reaction is:

\Delta H^o_{rxn}=[(1\times \Delta H^o_f_{(C_2H_2(g))})+(4\times \Delta H^o_f_{(H_2O(g))})]-[(2\times \Delta H^o_f_{(CO_2(g))})+(5\times \Delta H^o_f_{(H_2(g))})]

We are given:

\Delta H^o_f_{(H_2O(g))}=-241.8kJ/mol\\\Delta H^o_f_{(H_2(g))}=0kJ/mol\\\Delta H^o_f_{(C_2H_2(g))}=226.7kJ/mol\\\Delta H^o_{rxn}=81.1kJ

Putting values in above equation, we get:

81.1=[(1\times (226.7)})+(4\times (-241.8))]-[(2\times \Delta H^o_f_{(CO_2(g))})+(5\times (0))]\\\\\Delta H^o_f_{(CO_2(g))}=-410.8kJ/mol

Hence, the enthalpy of the formation of CO_2(g) is coming out to be -410.8 kJ/mol.

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