12 physics 4. Thermodynamics Page 2.



 12 physics  4. Thermodynamics    Page 2


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i)Positive work with varying pressure:











 Example melting of ice, freezing of water, boiling of water ,condensation of steam can be reversed this thermodynamics processes are reversible that is initial state of system can be reversed
                                                                                 
 
                                                                                      

                    






















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