<h3>The enthalpy of the reaction : C.226.73 kJ</h3><h3>Further explanation</h3>
Delta H reaction (ΔH) is the amount of heat change between the system and its environment
(ΔH) can be positive (endothermic = requires heat) or negative (exothermic = releasing heat)
The change in enthalpy in the formation of 1 mole of the elements is called enthalpy of formation
Delta H reaction (ΔH) is the difference between product enthalpy and reactant enthalpy (Hp-Hr)
Reaction :
2C + H2 -> C2H2
(ΔH) reaction = (ΔH) product - (ΔH) reactants
(ΔH) reaction = (ΔH) C2H2 - ((ΔH) C + (ΔH) H2)
for free element (ΔH) it has zero value, so (ΔH) C and (ΔH) H2 have zero value
From the available data: Hf (kJ / mol) C2 H2 (g)= 226.73
then
(ΔH) reaction = ΔH) C2H2 - ((ΔH) C + (ΔH) H2)
(ΔH) reaction = 226.73 - (0 + 0)
(ΔH) reaction = 226.73 (answer C)
<h3>Learn more</h3>
(ΔH) reaction
brainly.com/question/1889660
Keywords : (ΔH) reaction, C2H2
Explanation:
Complexometric titration (sometimes chelatometry) is a form of volumetric analysis in which the formation of a colored complex is used to indicate the end point of a titration. Complexometric titrations are particularly useful for the determination of a mixture of different metal ions in solution.
hope it will help u ✌️
Answer:
A
Explanation:
The entropy of a system has to deal with how energy is stored in a system. It tends to looks at the degree of disorderliness in the system.
The spontaneity of a reaction deals with the possibilities of the reactions occurring, while an exothermic reaction is one in which energy is released to the surroundings, the change in enthalpy here is negative.
The change in entropy or the change in enthalpy cannot dictate if a reaction is feasible I.e spontaneous or not. What determines the spontaneity of a chemical reaction is the change in free energy. For a reaction to be spontaneous, this value must be negative.
The change in free energy, the enthalpy and entropy are connected by the equation below:
ΔG = ΔH - TΔS
Now back to the question, for the first option, we were told that entropy increased and system is exothermic meaning negative enthalpy and positive entropy. In this case , change in free energy will be negative over all temperatures and hence, the reaction is spontaneous.
To the second option, we have negative entropy and negative enthalpy. Here change in free energy will only be negative at low temperature, which of course is not the best answer here
To the third option, we have negative entropy and positive enthalpy. This means change in free energy is only negative at high temperatures which of course is not the best answer.
This the reason and how it works