It’s 5% because without the 5% you wouldn’t make it to 100 equally
Answer : The value of for the reaction is, -390.3 kJ
Explanation :
According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.
According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.
The main chemical reaction is:
The intermediate balanced chemical reaction are:
(1)
(2)
(3)
Now we are reversing reaction 1, multiplying reaction 3 by 2 and then adding all the equations, we get :
(1)
(2)
(3)
The expression for enthalpy change for the reaction will be,
Therefore, the value of for the reaction is, -390.3 kJ
Answer:
calculate
ture
chemical equation:
2S03(g) 2502(g) + O2(g)
(a)
temperature and give its units.
In the vapour phase, sulphur trioxide dissociates according to the follow
Write , expression for this dissociation reaction.
producing a pressure of 10 atm. Calculate the value of Kp
At a particular temperature, 75% of sulphur trioxide is dissociate
The balanced equation would be:
2HCl + Mg(HCO3)2 —> MgCl2 + 2CO2 + 2H2O