Physics.heat problems!please!quite urgent.

there are lots of qustions asking that "the result obtained will be larger or smaller than the true value of x if....." i dunno why i'm always wrong in answering this type of question i really so confused. for example: there's an experiment to find the specific latent heat of... 顯示更多 there are lots of qustions asking that "the result obtained will be larger or smaller than the true value of x if....."

i dunno why i'm always wrong in answering this type of question
i really so confused.

for example:

there's an experiment to find the specific latent heat of vaporization of water
determine if the result obtained will be larger or smaller than the true value of l(v) if
(i) measurement is started before the water boils
(ii)some steam condenses and drips back into the beaker
(iii) some boiling water inside the beaker splashes out of the beaker

answer(i) is larger
as E=ml and E=pt, doesnt it mean l=pt/m?
in situation (i),i understand this one
measurement starts earlier and measured energy is larger
so l becomes larger at the same time

answer(ii) is larger
i dont understand this one because as the mass becomes larger
is that l will become smaller too?(l=E/m)

answer(iii) is smaller
and yes i understand this one too

but how about (ii)?
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