Question

**32) 3.00 moles of an ideal gas are expanded isothermally
against a constant pressure of 1 atm from 2.0 liters to 10.0 liters
at a temperature of 20.0 C.**

**Which of the following is incorrect?**

1. w = -PDV = -(1atm)(8 l) = -(101.3 J/l)(8 l) = -811.2 J

2. q = -w (since DU = 0) = 811.2 J

3. DU = 0 (since isothermal ideal gas)

4. DS_{SYS} = ∆H/T = 0

**33) In general, for a thermodynamic function F, ∆F°
indicates**

1. The variation of F in standard conditions

2. F in a pure state

3. The variation of F in a change of phase

4. The zero-order partial derivative of F

**34) Values for lnK are plotted at a function of 1/T in
an experiment to determine the standard state change of enthalpy of
a chemical reaction. The slope of the line is**

1. lnK at low temperatures

2. RT (with T in Kelvin)

3. ∆_{r}H°/R

4. T (in Kelvin)

**35) In general, for a pure substance in a given state,
the slope of G vs. T is**

1. Greater than zero

2. Equal to zero

3. Less than zero

4. Divergent

Answer #1

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