CHAPTER 4 -1st LAW OF THERMODYNAMIC

chapter 4 :1st Law of The Thermodynamics 

March 18, 2019

1st Law of Thermodynamic

Hi and Assalamualaikum everyone!

I want to share with u guys some knowledge that I had learnt,so let start's!

The first thermodynamic law is the formulation of  a more general law of physics (the law of conservation of energy) for thermodynamic processes. The first law of thermodynamics is simply a statement of conservation of energy principle and it asserts that total energy is a thermodynamic property.  Energy can neither be created nor destroyed; it can only change forms.This principle is based on experimental observations and is known as the First Law of Thermodynamics.

Steady flow process:            ➤ potential  

(Bernoulli'Theorem)                 ➤ kinetic

                                                ➤ internal energy 

                                                ➤ displacement

                                                ➤ heat

                                                ➤ work

Application:                           ➤ boiler

                                                ➤ condenser 

                                                ➤ turbine 

                                                ➤ nozzle

                                                ➤ throttling

                                                ➤ pump

Work(W) and Heat Transfer(Q)

∑W=∑Q

↓

W1+W2=Q1+Q2

➣ When work in,means the value of work is negative(-) and when work out,its value is

     positive(+).

➣ When heat transfer(Q) in,means the value of Q is positive(+) and when Q out,its
       value is negative(-).

Internal energy,U

ΔU=ΔQ-ΔW

Non-flow process:-

1.Isothermal,(T constant)

2.Isometric,(V constant)

3.Isobaric,(P constant)

4.Polytropic,(PVn constant)

5.Adiabatric,(Q=0)

Entalphy,H

H=U+PV

U=internal energy

P=pressure

V=volume

Formula for the continuity equation:-

Steady Flow Energy Equation

So that'all i can share with u guys,hope u're understand :))

DITULIS OLEH:NUR HAZWANI ATIRAH BT ZULKAWI (13DEM18F1036)