A _____ (released, absorbed, taken, +,-) ΔH means that energy is______ (released, absorbed, taken, +,-) from a reaction.
2 answers:
<u>Answer:</u> The blanks are completed below.
<u>Explanation:</u>
Enthalpy change of the reaction is defined as the difference in the potential energy of the products and the potential energy of the reactants. It is represented as
Mathematically,
When of the reaction is negative, then potential energy of the products is less than the potential energy of the reactants. So, energy is being released.
Thus, a +ve means that energy is released from a reaction.
When of the reaction is positive, then potential energy of the products is more than the potential energy of the reactants. So, energy is being absorbed.
Thus, a -ve means that energy is absorbed from a reaction.
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Hello!
We use the amount in grams (mass ratio) based on the composition of the elements, see: (in 100 g solution)
C: 83.7% = 83,7 g
H: 16.3% = 16.3 g
Let us use the above mentioned data (in g) and values will be converted to amount of substance (number of moles) by dividing by molecular mass (g / mol) each of the values, lets see:
We note that the values found above are not integers, so let's divide these values by the smallest of them, so that the proportion is not changed, let's see:
Note: So the ratio in the smallest whole numbers of carbon to hydrogen is 3:7, t<span>hus, the minimum or empirical formula found for the compound will be:
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I hope this helps. =)
We use the amount in grams (mass ratio) based on the composition of the elements, see: (in 100 g solution)
C: 83.7% = 83,7 g
H: 16.3% = 16.3 g
Let us use the above mentioned data (in g) and values will be converted to amount of substance (number of moles) by dividing by molecular mass (g / mol) each of the values, lets see:
We note that the values found above are not integers, so let's divide these values by the smallest of them, so that the proportion is not changed, let's see:
Note: So the ratio in the smallest whole numbers of carbon to hydrogen is 3:7, t<span>hus, the minimum or empirical formula found for the compound will be:
</span>
I hope this helps. =)
Answer:
The half life is
Explanation:
The half life of a first order reaction is mathematically represented as
Substituting for the rate constant