4H.5 Which substance in each of the following pairs would you expect to have the higher standard molar entropy at 298 K and 1 bar? Explain your reasoning. (a) Iodine vapor or bromine vapor; (b) the two liquids cyclopentane and 1-pentene (see structures); (c) ethene (ethylene) or an equivalent mass of polyethylene, a substance formed by the polymerization of ethylene.
Can someone help me with part b and c with explanations?
4H.5
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Re: 4H.5
Adding on, for part c, ethene is a gas, while polyethylene is a solid, so naturally, ethene will have higher entropy than polyethylene.
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Re: 4H.5
a) I2 has a lower mass so I2 has a higher molar entropy
b) the gases of both structures are not going to change, but pentane has more entropy because it is flexible and rotational versus cyclopentane which has less mobility since the bonds are stuck together
c) ethylene has higher molar entropy because it is a gas
b) the gases of both structures are not going to change, but pentane has more entropy because it is flexible and rotational versus cyclopentane which has less mobility since the bonds are stuck together
c) ethylene has higher molar entropy because it is a gas
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