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For question #4 you are asked to calculate the work from B to C (the process is reversible, isothermal expansion at 3045K). Both volume (L) and pressure (atm) are changing. What equation would you use to calculate work: w=-nRTln(v2/v1) or w=-nRTln(p1/p2)?
Not the same part of Question 4, but still about question 4. In finding the mass of water- where does the equation qwater +qboiling = m_water * C_water * ∆T + m_water * ∆H_vap come from?? I understand how it is related to q = mc∆T but where does the ∆H_vap come from?
@Coco Is the question you're asking about Q3? But I think the Hvap(water)*m(water) is the q(boiling) part of the equation q(water) + q(boiling) = -q(katana) so it's the thermal energy of boiling the water.
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