This is true and is how we calculate the pressure in

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Unformatted text preview: intermolecular interactions) e) The change in energy with volume at constant temperature is equal to 0 for ideal gases. True statement. The molar volume of a pure substance follows the Gibbs Phase Rule, which indicates that Um is only a function of two intensive variables. Hence, we would write Um(Vm,T) to indicate that the molar energy is for a pure substance a function of Vm and T. Alternatively, we can write that U is a function of V and T or U(V,T). For ideal gases, the molar energy is only a function of T (no intermolecular interactions). Hence, the energy is only a function of the temperature [(∂Um/∂Vm)T = 0 or (∂U/∂V)T = 0] f) Go in the lab and add three 2 mg- nuggets of gold, one 5 mg nugget of silver, a fraction of a tea spoon of table salt, a droplet of oil to a gallon of water in a two- gallon bucket and close the lid. The bucket contains four phases. Incorrect statement: gold is one phase, silver is one phase, table salt dissolves in water and forms with water one liquid phase, oil does not dissolve in water (or very little does) and forms its own separate liquid phase, the air above the liquid forms the last phase). Hence, there are five phases. Question 4: (5 points) Which of the following statements is incorrect? a) A homogeneous solution containing multiple components is a one- phase system. This is true and is the definition of a phase (regardless of the number of components) b) The state property one refers to when discussing the frequency and s...
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