Steam passes into a jug to warm up some cold water. In this
question, you may ignore any heating of atmosphere.
Pure steam enters at 100deg cel and jug initially contains 500g
of water at 20 deg cels. Eventually water in the jug reachers a
temperature of 100 deg cel. Specific heat capacity of water is
4.20J/g deg cel and specific latent heat of vaporisation of water
is 2250J/g.
1calculate energy needed to warm 500g of water from 20 deg cel
to 100 deg cel.
2. calculate final mass of water in jug when temperature has
reached 100 deg cel.
For the first question, do i just find the energy using the S.
heat capacity method or do i need to include the s. latent of of
vaporisation method? I don't think we needa find the energy for the
latter since there's no change in state anyway.
as for the second question do i equate the energy(FOUND USING
S.HEAT CAPACITY METHOD) with the s. latent heat of vaporisation? i
got 74.....g. then do i add on to the initial 500g of water? by the
way, why does water in jug increase anyway?
ADAPTED FROM TYS (N2000 P2 Q5)
