Clapeyron Definition and 17 Threads

So i think i am missing something pretty dumb, but anyway: $$|\Delta P_{ressure}| = \rho_{s} g \Delta H$$ Claperyon equation: $$\frac{\Delta P}{\Delta T} = \frac{\Delta L_{m}}{\Delta V_{m} T}$$ Equally both: $$|\rho_{s}| = \frac{|\Delta T \Delta L_{m}|}{|\Delta H \Delta V_{m} g T|}$$ My...

First, I calculated the number of moles of glucose. n = m / M n = 1.8 / 180 n = 0.01 moles of glucose So I checked the combustion reaction. 1 C6H12O6 + 6 O2 -> 6 CO2 + 6 H20 1 + 6 -> 6 + 6 0.01 + 0.06 -> 0.06 + 0.06 I considered the number of moles at the end of the reaction. I subtracted...

Hello everyone, I'm doing revision for a final exam in Thermodynamics and i found this exercise i can't solve: A particular material has a latent heat of vaporization Δh, constant along the coexistence curve. One mole of this material exists in two.phase (liquid-vapor) equilibrium in a...

The question is in the title. However my mathematical ability is limited as I am a high school student. Thank you in advance

Homework Statement A person (mass 57.8 kg) tries to penetrate a garden fork (mass 1 kg) into a melting block of ice by standing on it with all his/her weight. Assume that no heat flows from the fork to the ice. The fork has four prongs, and each prong has a square cross section of area 1 mm2 ...

Homework Statement The Clapeyron cycle efficiency is similar to the Carnot cycle except that two adiabatic paths are replaced with isobaric processes a) based on the above information, draw a Clapeyron cycle. b)Derive the efficiency of the reversible Clapeyron cycle Homework...

Homework Statement Determine the vapor pressure of water at 50 degrees C. The molar heat of vaporization of water is 40.7 kJ/mol. Homework Equations Clausius-Clapeyron equation. The Attempt at a Solution P1 = 760 mm Hg T1 = 373 K P2 = ? T2 = 323 K ln (P2/760) = ln P2 - ln 760 =...

spent 3 hours on this, getting nowhere find the change in transition temperature, given: P1,P2,T1,ΔH,density (mixed so gives d1 of metal 1 and d2 of metal 2,atomic weight Tried solving for T1 then for ΔT simply saying ΔT = (T1 - T2) , but its clearly not correct and i haven't made use of...

Hi everyone. I am having a problem that hopefully someone here can help me with. For the purposes of flash calculations, I’m trying to find the enthalpy of vaporization of a compound using the Antoine equation and Clapeyron equation. I am using heptane at 15.5597 psia as an example. For the...

Homework Statement Trying to figure out the boiling point for a substance using this equation. I have 3 temperatures along with the pressure at those three temperatures. Homework Equations lnP=−ΔHvap/RT+b The Attempt at a Solution Ok, so obviously a plot of ln(P) vs. (1/T) gives you a...

Homework Statement Here there is another problem from callen which I couldn't finish. It says: It is found that a certain liquid boils at a temperature of 95ºC at the top of a hill, whereas it boils at a temperature of 105º at the bottom. The latent heat is 1000cal/mole. What is the...

Homework Statement When lead is melted at atmospheric pressure the melting point is 327.0 degrees C, the density decreases from 1.101 x 10^4 to 1.065 x 10^4 kg/m^3 and the latent heat is 24.5 kJ/kg. Estimate the melting point of lead at a pressure of 100 atm. Homework Equations...

It has been years scene I have taken a math class and I need help to see if I am setting the equation up correctly and if I have solved the problem correctly. Diethyl ether has ∆Hvap of 29.1kJ/mol and a vapor pressure of 0.703 atm at 25.0 C. What is its vapor pressure at 95.0 C? I converted...

Homework Statement slope: -8.000 x 10^3 K The graph is of ln vapor pressure of a gas vs. invert kelvin temperature Using the Clausius Clapeyron equation, find Hvap (heat of vaporization) Homework Equations Clausius Clapeyron equation: ln P= (-delta Hvap/R)*(1/T) + C The Attempt...

Hi I am stuck on this question. I am given the slope of a ln vapor pressure vs. invert kelvin temp equals -8.000 x 10^3 K. I am supposed to find delta H (or the heat of vaporization). If anyone could help that would be great!

why's it positive for most materials?