The discussion revolves around calculating the energy required to heat water and the heat released during the condensation of steam. The subject area includes thermodynamics and heat transfer concepts.
The discussion includes various attempts to apply the relevant equations, with some participants expressing uncertainty about the initial steps and the values needed. Guidance has been offered regarding the specific heat of water and the latent heat concept, but no consensus has been reached on the calculations.
Participants are working within the constraints of a homework assignment, which may limit the information they can use or the methods they can apply. There is also a focus on understanding the definitions and values associated with the equations presented.
jacob95 said:Homework Statement
How many joules are required to heat 250 grams of liquid water from 25 C to 100 C
How much heat is released when 200 grams of steam condenses?
Homework Equations
q=m*(delta) t*c
q=(delta)H*m
The Attempt at a Solution
I don't know how to begin
jacob95 said:so would it be
q=250g*75°C*4.186j=78487.5 joules?
or
q=250g*75°C*1
then I would have to convert it to calories
78 487 joules = 18 758 cal?
jacob95 said:what does ΔH stand for in
q=ΔH*m?