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songoku
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Homework Statement
Suppose 1 g of water vaporizes isobarically at atmosphere pressure (1.013 x 105 Pa). Its volume in the liquid state is Vi = 1 cm3, and its volume in the vapor state is Vf = 1671 cm3. Find the change in internal energy
Homework Equations
[tex]\Delta U = \Delta Q - \Delta W[/tex]
[tex]\Delta W = p*\Delta V[/tex]
The Attempt at a Solution
I want to ask about [tex]\Delta V[/tex].
[tex]\Delta V = V_2-V_1[/tex]
V2 = Vf, and what is V1 ? Is it Vi or is it zero because volume of vapor is zero initially?
Thanks