CHE201 FINAL TERM SOLVED PAPERS
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Equilibrium thermodynamics deals with systems in equilibrium An isolated system is in equilibrium when its macroscopic properties remain constant over time An unisolated system is in equilibrium when the following two conditions hold Answer: The macroscopic properties of the system remain constant over time B. Removing the system from contact with the environment will not cause any change in the properties of the system If condition (A) holds but (B) does not, the system is in a steady state.
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CHE201 FINAL TERM PAST PAPERS:
For example, a mole of hydrogen of atoms contains 6.02 1023 H atoms; A mole of water molecules contains 6.02 1023 molecules of H2O. We have shown earlier in this section that if Mr, i is the molecular weight of species I, then the mass of 1 mole of species i is equal to Mr, I grams. Weight per A mole of a pure substance is called its molar mass M. For example, H2O is M 18.015 g/mol.
CHE201 FINAL TERM PAST PAPERS BY MOAAZ:
where mi is the mass of the substance I in the sample and ni is the number of moles I in the sample. Molar mass Mi and molecular weight Mr, I z I am related by Mi Mr, I 1 g/mol, where Mr, i is a dimensionless number.
CHE201 FINAL TERM SOLVED PAPERS:
Mechanical balance: There are no unbalanced forces acting on or within System; therefore the system undergoes no acceleration and there is no turbulence within the system. Material balance: No pure chemical reactions take place in it system nor is there any net mass transfer from one part of the system to another or between the system and its surroundings.