Question

9. Write true or false a) Partial molar volume is defined as y = b) The volume of a solution at T and p is equal to the sum o

please kindly help with true or false from a to j. thank you

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Answer #1

a) True, as the partial molar volume is the change in the volume of system when infinitesimally small amount of "i",'j' or 'k' is added or subtracted from the system at constant temperature and pressure. We cannot measure the change in volume by varying temperature and pressure as that would give us false results and results due to change in composition (by adding subtracting i, j or k) will be masked otherwise. Therefore this formula is correct.

b) True , Volume is extensive property and it will be the sum of all components of system.

c) False , let us suppose we have components i and j comprise 100 ml of whole system. The molar volume for i will be Vi / ntotal

whereas partial molar volume is Change in volume with no. of moles of j plus change with moles of i .

d) True, its unit is equivalent to m3/mol.

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