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

Assignment Help:

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


Related Discussions:- Joule''s law and enthalpy - thermodynamics

Biaxial tension-compression state, Given:  A brittle material has an ulti...

Given:  A brittle material has an ultimate tensile strength of 300 MPa and an ultimate compressive strength of  -1000MPa.  Assume that failure can be represented by the Modified

Compute the force exerted by the tires on the road, Compute the force exert...

Compute the force exerted by the tires on the road: An automobile of mass 1500 kg traverses a 500 m curve at a constant speed of 50 kmph. Supposing no banking of the curve,

Reduce system to a single force and couple, Reduce system to a single force...

Reduce system to a single force and couple: Q: A system of parallel forces is acting on rigid bar as shown in the figure given below. Reduce this system to  a single force

Dynamics of the water tank, A Perspex tank ure 1), which has parallel sides...

A Perspex tank ure 1), which has parallel sides for the top part of its height and a 'V' shaped section for the bottom part and a constant width throughout, is used as a receptacle

Working principle of carburettor , Working Principle of Carburettor : All ...

Working Principle of Carburettor : All carburettors work on one basic principle, the venturi. A venturi is a very simple device that changes air pressure by changing the velocity

Power sources for arc welding, POWER SOURCES FOR ARC WELDING Electric ...

POWER SOURCES FOR ARC WELDING Electric arc welding processes constitute a majority of all the welding processes. Most of the weldable materials can be joined by arc welding. D

Describe pendulum pump mechanism, Describe in detail the following mechanis...

Describe in detail the following mechanisms : (a) Pendulum Pump (b) Crank and slotted lever mechanism Explain in detail the following mechanisms : (a) Elliptical Tramme

Petrol-general safety tips , Petrol: Work in a well-ventilated area. Keep ...

Petrol: Work in a well-ventilated area. Keep flames or sparks away from the work area or where petrol is stored.

Determine the steady state amplitude of vibration, 1. (a) Sketch frequency-...

1. (a) Sketch frequency-response curves for a damped single degree of freedom system subjected to a harmonic excitation under three different damping ratios. The system has a natur

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd