Chemistry, 13.01.2020 13:31 d1Dej

On a temperature versus time graph, how does the temperature at the beginning of a change of state compare with the temperature at the end of the change?

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The temperature is the same. During a phase change, a sample is gaining heat with out a change in temperature since all of the energy is being put into the breaking of the intermolecular forces which makes it so that the average kinetic energy of the particles in the substance does not change (the energy is not used to speed up the particles). I hope this helps. Let me know if anything is unclear. (I used a phase change that is gaining heat shuch as boiling and if you reverse my explanation it explains a phase change that is loosing heat such as freezing).

Answer from: madison1284

Answer : always the same

i took the test lol

Answer from: Quest

passed in september 1935, these laws are known as nuremberg laws. they forbid jews from marrying but not directly forced them to divorce aryans. what is most noticeable is the fact that the jews were defranchised, meaning by this that they were not expected to have any civil rights, including the right to vote. the right answer is deprived of the right to vote.

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the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. $hbr$ completely dissociates to $h^+$ and $br-$ ions. a is incorrect because $h_2s$ does not fully ionize to $h^+$ and $hs^-$ ions and some remain as the compound $h_2s$ . c and d are incorrect because, $li_2o$ and $libr$ do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise, if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both $li_2o$ and $libr$ have a complete octet so can not accept any electrons which disqualifies them as acids.

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On a temperature versus time graph, how does the temperature at the beginning of a change of state c...

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