The negative ion reactions that consist of the formation of carbon dioxide in the atmosphere is generally an exothermic reaction. By definition, an exothermic reaction takes place when the chemical process eventually releases heat as its by-product. It is in contrast in endothermic process wherein heat is absorbed.
The true statements about activation energy are as follows:
- Activation energy is the minimum quantity of energy that the reactants must possess in order to undergo a specified reaction.
- Activation energy is determined by the strength of the bonds that must be broken.
<h3>What is activation energy?</h3>
Activation energy is the minimum amount of energy that reactants in a chemical reaction must possess so as to get converted into products.
In a chemical reaction, reactants form products, hence, certain bonds must be broken in the reactant molecules to form the products.
The energy needed to break the bonds of the reactants is known as activation energy.
Therefore, the true statements about activation energy are as follows:
- Activation energy is the minimum quantity of energy that the reactants must possess in order to undergo a specified reaction.
- Activation energy is determined by the strength of the bonds that must be broken.
Learn more about activation energy at: brainly.com/question/11334504
Carbon 12 and carbon 14 are two isotopes of the elements carbon.the difference between carbon 12 and carbon 14 is the number r of neutrons in each atom.the number given after the atom name (carbon) indicates the numbers of protons plus neutron is an atom or iron. Atom of both isotopes of carbon contain 6 protons
Answer:
Explanation:
When calcium hydroxide is dissolved in water , it ionizes as follows .
Ca( OH)₂ = Ca⁺² + 2 OH ⁻
When it is dissolved in water which contains minimal OH⁻ , so there is almost no common ion effect . Hence calcium hydroxide is fully dissolved in pure water solvent .
When 1.00 mole sample of solid calcium hydroxide is added to 500.0 mL of 0.500 M sodium hydroxide solution in beaker , it is not fully dissolved due to common ion of hydroxide ion ( OH⁻ )
NaOH = Na⁺ + OH⁻
OH⁻ ion from NaOH , suppresses the dissolution of calcium hydroxide .
Similarly
When A 1.00 mole sample of solid calcium hydroxide is added to 500.0 mL of 0.200 M sodium hydroxide solution in beaker , it is not fully dissolved due to common ion of hydroxide ion ( OH⁻ )
NaOH = Na⁺ + OH⁻
OH⁻ ion from NaOH , suppresses the dissolution of calcium hydroxide
When 1.00 mole sample of solid calcium hydroxide is added to 500.0 mL of 0.200 M calcium nitrate solution , it is not fully dissolved due to common ion of calcium ion ( Ca⁺² )
Ca( NO₃)₂ = Ca⁺² + 2NO₃⁻
Ca⁺² ion from Ca( NO₃)₂ , suppresses the dissolution of calcium hydroxide .
<span>Answer:
Ground state of Hydrogen = -13.6 eV Energy of photon emission: E = hf = hc/λ = 6.6256E-34 (3E8)/680E-9 E = 0.0292E-17 J(1 eV/1.6E-19 J) = 1.825 eV E(photon) = 1.825 eV Bandgap energy: ΔE = E – Eo = 1.825 – (-13.6) = 15.425 eV</span>