Answer:
The thermal energy is the average kinetic energy of the particles in an object.
Explanation:
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In this case, since the thermal energy is associated to the temperature and the system and its effect over the molecules in the light of their movements, we infer that the proper answer is:
"The thermal energy is the average kinetic energy of the particles in an object".
On the contrary, we consider that the internal energy is referred to the total energy of the particles in the system and the translational energy is associated to the eventual movement of the system.
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Answer:
A- Solubility decrease.
B- Solubility increase.
C- No solubility change.
Explanation:
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In this case, since the solubility of salt stands for the maximum amount of salt that can be added to a specific mass of water, usually 100 g; we need to take into account that for table salt in aqueous solution, the higher the temperature the larger the solubility and the lower the temperature the smaller the solubility; it means that more salt is dissolved in the same mass of water at higher temperatures and vice versa. Therefore, A- would decrease the solubility as the solution is cooled down and B- would increase the solubility as the solution is heated up.
Moreover, since the mass of water is assumed to remain the same, adding more salt do not affect the solubility but increase the degree of saturation of the solution up to supersaturated, yet the solubility remains unchanged.
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Combustion. You said CH4 'burns' in the question which is another word for combustion.
Answer:an article or substance that is manufactured or refined for sale.
"food products"
2.
a thing or person that is the result of an action or process.
"her perpetual suntan was the product of a solarium"
Explanation:
Answer:
trans-1,3-pentadiene is more stable than 1,4-pentadiene due to presence of a conjugated double bond.
Explanation:
Here, 
H(hydrogenated pdt.) is same for both 1,4-pentadiene and 1,3-pentadiene as they both produce pentane after hydrogenation
H(diene) depends on stability of diene.
More stable a diene, lesser will be it's H(diene) value (more neagtive).
trans-1,3-pentadiene is more stable than 1,4-pentadiene due to presence of a conjugated double bond.
Hence, 
is higher (less negative) for trans-1,3-pentadiene
