Answer:reaction 2,5,6
Explanation:
First, we need to define what the enthalpy of formation is and what the enthalpy of reaction is____
<u>Formation Enthalpy</u>: It is the variation of the calorific energy in the reaction of ONE MOL of a compound starting from the elements.
<u>Reaction Enthalpy: </u>It s the variation of the calorific energy in the reaction of reactives, in this cases could be any quantity of mol
Then: We have six reactions:
1)CaCO3(g)→ CaO+ CO2(g)
2)Li(s)+12F2(g)→LiF(s)
3)CO(g)+12 O2(g)→ CO2(g)
4)2Li(s)+F2(g)→2LiF(s)
5)Li(s)+12F2(l)→LiF(s)
6)C(s,graphite)+ O2(g)→ CO2(g)
The enthalpy of reaction will be equal to reaction enthalpy when we produce one mol from elements
The answer is the reactions 2,5,6
Answer: <span>The actual yield depends on the reaction conditions, but the theoretical yield varies only with reactant amounts.
The actual yield has to be detemined from the real data.
The theoretical yield is calculated with the reactants amoounts and the theroretical molar ratios indicated by the chemical equation. Thus, the theoretical yield is the maximum possible yield, from the total reaction of the limiting reactant. The actual yield must be detemined under the particular contitions on which the reaction is performed.
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<h3>
Answer:</h3>
915 Joules
<h3>
Explanation:</h3>
- The heat of fusion is the heat that is required to convert a given mass of a substance from solid state to liquid state without change in temperature.
- In this case, we are given specific heat of a substance as 122 joules per gram
- It means that amount of heat equivalent to 122 joules is required to change 1 gram of the substance from solid state to liquid state.
- Therefore, we can determine the amount of heat needed to change 7.5 grams of the substance from solid to liquid state.
1 g = 122 Joules
7.5 g = ?
= 122 × 7.5
= 915 Joules
Thus, 7.5 g of the substance at its melting point will require 915 Joules of heat to melt.
Answer:
Chemical reactions make new chemicals or compounds
Explanation:
YW!!