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23 Nov 2019

Given that system A went a longer path than system B. Which of the following statements must be true? a) W change b) Q change c) ΔE change d) They are constant e) They all change f) Q stayed constant

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Beverley Smith
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16 Feb 2019

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Related questions

The change in internal energy, ΔE, of a system is represented by the relation between heat (q) and work (w) as:

A) E = w - q

B) E = q + w

C) E = w/q

D) E = q/w

An ideal gaseous reaction (which is a hypothetical gaseous reaction that conforms to the laws governing gas behavior) occurs at a constant pressure of 50.0 atm and releases 60.4 kJ of heat. Before the reaction, the volume of the system was 7.80 L . After the reaction, the volume of the system was 2.80 L . Calculate the total internal energy change, ΔE, in kilojoules. Express your answer with the appropriate units. ΔE = -35.2 kJ SubmitHintsMy AnswersGive UpReview Part Correct Although the system absorbed some energy in the form of work, the significant release of heat caused the total change to be negative. State functions versus path functions The change in internal energy, ΔE, is a state function because it depends only on the initial and final states of the system, and not on the path of change. In contrast, q and w are path functions because they depend on the path of change and not just the initial and final states of the system.

Part C An ideal gas (which is is a hypothetical gas that conforms to the laws governing gas behavior) confined to a container with a massless piston at the top. (Figure 2) A massless wire is attached to the piston. When an external pressure of 2.00 atm is applied to the wire, the gas compresses from 6.60 to 3.30 L . When the external pressure is increased to 2.50 atm, the gas further compresses from 3.30 to 2.64 L . In a separate experiment with the same initial conditions, a pressure of 2.50 atm was applied to the ideal gas, decreasing its volume from 6.60 to 2.64 L in one step. If the final temperature was the same for both processes, what is the difference between q for the two-step process and q for the one-step process in joules? Express your answer with the appropriate units.

please answer for Part C

1. Check all of the following statements that are true:

a. The value of q is always equal to the value of w for a reversible reaction

b. The energy change of the universe for any spontaneous process is always positive

c. The equilibrium constant is always equal to one for any system at equilibrium

d. The free energy change for any spontaneous process is always positive

e. None of these statements are true

f. The entropy change of the universe for any spontaneous process is always positive

g. The equilibrium constant is always greater than one for an extensive reaction

2. What mass of Na2SO4 is required to make 60 mL of a 0.20 M Na2SO4 solution? Report your answer to three places past the decimal point.

_____g of Na2SO4

3. Select all of the compounds below that are more soluble in water than in CCl4. (You should check anywhere from one to four boxes.)

HCl

NH3

FeCl2

Cl2

None of these are more soluble in water

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