Joule''s law and enthalpy - thermodynamics, Mechanical Engineering

Joule's Law and Enthalpy - Thermodynamics:

Joule's Law

Joules law experiment is based on the constant volume process, and it state that I.E. of perfect gas is a function of absolute temperature only.That is, 

U = f(T)

dU = dQ - dW; It define constant volume that is
dw = 0 dU = dQ; but dQ = mCvdT, at constant volume

dU = mCvdT; for a perfect gas

Enthalpy

It is sum of I.E. (U) and pressure - volume product.

H + pv

For unit mass pv =RT

  h = CVT + RT = (CV  + R)T = CPT = (dQ)P

  H = mCPT

  dH = mCPdT

Posted Date: 10/15/2012 2:18:13 AM | Location : United States







Related Discussions:- Joule''s law and enthalpy - thermodynamics, Assignment Help, Ask Question on Joule''s law and enthalpy - thermodynamics, Get Answer, Expert's Help, Joule''s law and enthalpy - thermodynamics Discussions

Write discussion on Joule''s law and enthalpy - thermodynamics
Your posts are moderated
Related Questions
Determine the maximum uniformly distributed load: A timber beam 150 mm wide & 300 mm deep is supported simply over a span of 4 m. determine the maximum uniformly distribute


Evaluate the chebyshev Spacing for a function y = 2 x 2 - x for the range 0 ≤ x ≤ 2 where four precision point are required. For these precision points, determine φ 2 , φ 3 , φ 4

Deflection at the centre: A simply supported beam of span 6 m is subjected to Udl of 24 kN/m for a length of 2 m from left support. Discover the deflection at the centre, maxi


SURFACE MODELING: The process of modeling is built much easier for a mathematical description of an object or at least on a part of the object might be applied. Surfaces might

priming and foaming

Is bleed necessary in condensing and back pressure both the turbine? What is the use of bleed in steam turbine? What is the basic difference in condensing and backpressure turb

Determine the maximum value of the coefficient of friction: A force of 200 N inclined at 60 o to the horizontal is applied to the block A weighing 400 N. find out whether blo

derive an expression for range along iclined palne