True a negative change in enthalpy means an exothermic reaction
Answer:
See explanation
Explanation:
Polymerization is the process whereby two or more monomers link together to form a compound of high molecular mass called a polymer.
There are two kinds of polymers;
-Addition polymers
-Condensation polymers
Addition polymers are formed by the joining of two or more monomers to form a polymer without the elimination of a small molecule.
Condensation polymers are formed by the joining of two or more molecules to form polymers with the elimination of a small molecule.
The main difference between polyethene and polyester is that polyethene is an addition polymer while polyester is a condensation polymer.
In polyethene, ethene molecules are joined together having the repeating unit as [-CH2-CH2-]n.
In polyester, the polymer arises from the reaction of carboxylic acid and an alcohol and loss of water molecules.
First convert the 112 km/hr ratio into m/s (meters per second). To do this you multiply 112 km with 1000 m/km (since there's 1000 m in one km). You get 112000 m. Then multiply 1 hr with 60 min/hr (since there's 60 min in one hr. You get 60 min, but you want seconds, so multiply 60 min with 60 s/min to get 3600 s. There you go! Your answer is the speed of 112000m/3600s, but you can simplify that to 31.11m/s (since the answer should be in ? meters per 1 second.
Also, the "100-m-distance" part of the question is just to throw you off, because one particular speed obviously stays constant over any distance. Hope that helps :)
Answer:
the atom has equal protons and electrons so it should by without charge
I think this is the correct answer
hope this will help you ❤️
Since benzene is a covalently bonded chemical, ions and ionic bonds have no bearing on it. Simply put, boiling will cause the molecules to split from one another and turn into a gas.
Benzene boils at a greater temperature than other hydrocarbons with comparable molecular sizes, at 80°C (pentane and hexane, for example). The increased boiling point is most likely caused by how simple it is to create transient dipoles involving the delocalized electrons. At 111°C, methylbenzene begins to boil. Pure benzene and pure toluene have normal boiling points of 80.1 C and 110.6 C, respectively. Due to fewer intermolecular interactions, benzene has a lower boiling point than toluene.
Learn more about benzene here-
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