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Originally posted by: NoorFatima

Chemistry i REALLY really and urgently need help getting the applications and importance of Van't Hoff Equation for my assignment.. they havent even taught us this in the class =/ ..

Happy New Year!

The Van't Hoff equation is
d(ln K)/dT = deltaHo/RT^2,
where K = equilibrium constant
T = absolute temperature,
deltaHo = standard change in enthalpy of the reaction

Thus, the Von't Hoff equation tells how the equilibrium constant changes with temperature.

Assumptions: The equation is an approximation because it assumes that both enthalpy and entropy changes of a reaction are assumed to be constant with temperature.

Importance: The equation is used to estimate the equilibrium constant at a new temperature. Integrating the equation between initial temperature T1 and final temperature T2 gives

ln(K2/K1) = (deltaHo/R)(1/T1 - 1/T2),
where K₁ = the equilibrium constant at absolute temperature T1
K₂ = the equilibrium constant at absolute temperature T2

http://www.youtube.com/watch?v=uwNjRCC9PUs

Here is the video on how to do it. If you still have problem after this video, let me know.And, I will do the problems for you.😳

Originally posted by: Siberian_Pigeon

http://www.youtube.com/watch?v=uwNjRCC9PUs

Here is the video on how to do it. If you still have problem after this video, let me know.And, I will do the problems for you.😳

Hey

A girl, having height 95 cm is walking away from the base of an electric pole, having a focus light, at a speed of 1.1m/sec. If the focus light on the electric pole 4.75 metres above the ground, find the legth of her shadow after 5 seconds.

Please tell me how to solve this with the help of a diagram.

A sphere contract in volume by 0.01% when taken to the bottom of sea 1 km deep. Find bulk modulus of sphere.

pls help.. !

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