Answer: Option (a) is the correct answer.
Explanation:
Enthalpy is defined as the total amount of heat present in a system.
When there is bond formation in a chemical reaction then it means energy is released. Hence, the reaction is exothermic in nature and 
< 0 or negative.
On the other hand, when breaking of bonds occurs then energy is absorbed by the system. Hence, the reaction is endothermic in nature and > 0 or positive.
Thus, in the given reaction 
, the state is changing from liquid to solid.
This means atoms are coming close to each other and hence, there is occurrence of bond formation. As a result, energy will be released to the surroundings.
Hence, we can conclude that H < 0 for the given reaction.
Answer: Initial pH is 13.243
12.83
1.3
40ml
7
Explanation:
Just finished the test.
Answer:
The correct answer is nuclear binding energy.
Explanation:
The least amount of energy, which is needed to distinguish an electron from an atom or to break the neutrons and protons from the nucleus of the atom is termed as the binding energy. This form of energy is also called separation energy. When a bound system is produced, the binding energy is equivalent to the mass defect less the concentration of the mass or energy discharged.
There are many types of the binding energy of which the energy, which is needed to dissociate a nucleus into the individual neutrons and protons is known as the nuclear binding energy.
Answer:
<u><em>Explain both aldehydes and ketones, the geometry around the carbon atom in the carbonyl group is trigon planar; the carbon atom exhibits sp2 hybridization. Two of the sp2 orbitals on the carbon atom in the carbonyl group are used to form σ bonds to the other carbon or hydrogen atoms in a molecule. The remaining sp2 hybrid orbital forms a σ bond to the oxygen atom. The hybridized p orbital on the carbon atom in the carbonyl group overlaps a p orbital on the oxygen atom to form the π bond in the double bond.ation .</em></u>
