Answer:
Gibbs equation helps us to predict the spontaneity of reaction on the basis of enthalpy and entropy values directly. When the reaction is exothermic, enthalpy of the system is negative making Gibbs free energy negative. Hence, we can say that all exothermic reactions are spontaneous.
1.66x10^-15 mol. It's not a full mole. You take the number of molecules and use dimensional analysis to figure it out.
Answer:
The concentration of Hydrogen Cation is:
Pure water is<u> NEUTRAL</u>
Explanation:
pH = It is negative logarithm of activity of Hydrogen ions.
Activity = concentration for dilute solutions
There are three types of solution based on pH:
1. Acidic solution : Those solution which have pH between 0 to 7 or less than 7 are acidic in nature . They turns blue litmus red.They contain more H+ ions than OH- ions
2. Basic : Those solution which have pH value greater that 7 of between 7 to 14 are basic in nature . They turn red litmus blue.They contain more OH- ions then H+ ions
3 . Neutral : Those solution which have pH = 7 are neutral . They are neither acidic nor basic in nature .They have equa;l concentration of H+ and OH- ions in the solution.
The given water has pH = 7 .This means it is neutral and has low H+ ion concentration in solution. The H+ ion are :
M in water.
OH- =
M in water
So overall neutral
Answer :
(1) This reaction is a combustion reaction.
(2) This reaction is a decomposition reaction.
(3) This reaction is a combustion reaction.
(4) This reaction is a combination reaction.
(5) This reaction is a combination reaction.
Explanation :
Combination reaction : It is a type pf reaction in which the two or more molecules combine to form a larger single molecule as a product.
Decomposition reaction : It is a type of reaction in which a single larger compound decomposes to give two or more smaller molecules as a product.
Combustion reaction : It is a type of reaction in which a hydrocarbon molecule react with the oxygen molecule to give carbon dioxide and and water as a product.
1.
This reaction is a combustion reaction.
2.
This reaction is a decomposition reaction.
3.
This reaction is a combustion reaction.
4.
This reaction is a combination reaction.
5.
This reaction is a combination reaction.
Answer:
4.6g
Explanation:
We are given the following parameters:
Molecular weight of the compound = 74g/mol
Volume = 2500mL = 2.5L or 2.5dm³
Concentration = 0.025M
Unknown:
Mass of compound = ?
Solution:
To solve this problem, we need to find the number of moles from the given concentration and volume values.
Number of moles = concentration x volume
So;
Number of moles = 0.025 x 2.5 = 0.0625mol
Therefore, mass of compound;
Mass = number of moles x molar mass
Mass = 0.0625 x 74 = 4.6g