<u>Answer: </u>54 molecules of water will be formed in the reaction.
<u>Explanation:</u>
A balanced chemical equation is one where all the individual atoms are equal on both sides of the reaction. It follows the law of conservation of mass.
For the given unbalanced chemical equation, the balanced equation follows:
![2C_8H_{18}+25O_2\rightarrow 16CO_2+18H_2O](https://tex.z-dn.net/?f=2C_8H_%7B18%7D%2B25O_2%5Crightarrow%2016CO_2%2B18H_2O)
We are given:
Molecules of
= 6
Molecules of
= 75
By the stoichiometry of the reaction:
If 2 molecules of
produces 18 molecules of water
So, 6 molecules of
will produce =
molecules of water
Hence, 54 molecules of water will be formed in the reaction.
Answer:
The dictionary definition of motion : the action or process of moving or being moved.
Answer:
a) ΔU = 370 KJ
b) Endothermic
Explanation:
a)
The change in energy of the mixture can be given by first law of thermodynamics as:
ΔQ = ΔU + W
ΔU = ΔQ - W
where,
ΔQ = change in heat energy of system
ΔU = Change in internal energy of gases
W = Work done on gases = - 155 KJ
For an isobaric process (i.e constant pressure) we know that:
ΔQ = change in enthalpy = ΔH
ΔQ = 215 KJ
Therefore, using values in the equation, we get:
ΔU = 215 KJ - (-155 KJ)
<u>ΔU = 370 KJ</u>
b)
Since, the enthalpy of products is greater than the reactants. Therefore, this is an <u>endothermic reaction</u>.
The mass of one mole of H is 1.008 grams.