For the chemical C2 H6- C2 H4+H2+137kJ, the chemical energy of the
1 answer:
Hi!
In this reaction, the chemical energy of of the products ( C2H4 & H2 ) are greater than the chemical energy of the reactant ( C2H6 ).
We can see this by the value of the change of enthalpy in the system which in this given reaction is +137 kJ.
The positive enthalpy change indicates that the energy invested in the reaction is more than the energy released, which means that the system has absorbed energy. This is often translated as the products being at a higher level of energy as compared to the products.
This is an example of an endothermic reaction, and you can develop a better understanding by referring to the attached picture.
Hope this helps!
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Answer:
a) volume of ammonium iodide required =349 mL
b) the moles of lead iodide formed = 0.0436 mol
Explanation:
The reaction is:
It shows that one mole of lead nitrate will react with two moles of ammonium iodide to give one mole of lead iodide.
Let us calculate the moles of lead nitrate taken in the solution.
Moles=molarityX volume (L)
Moles of lead nitrate = 0.360 X 0.121 =0.0436 mol
the moles of ammonium iodide required = 2 X0.0436 = 0.0872 mol
The volume of ammonium iodide required will be:
the moles of lead iodide formed = moles of lead nitrate taken = 0.0436 mol
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