Energy Balances Applications in the Absence of Chemical Reactions

This quiz contains multiple-choice problems on energy balance simplifications and solving, open and closed energy balance applications, enthalpy of formation and reaction, heat of combustion, and heat merging concepts.

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What is the work done by an open steady-state system if heat transferred to it is 10 J?

0 -10 J 10 J Cannot be determined

In an open system, what is the enthalpy change is heat taken from it is 10 J?

0 -10 J 10 J Cannot be determined

What is the work done for an isochoric process?

Positive Negative Zero Cannot say

What is the work done for an ideal gas isothermal process?

Zero Equal to heat transferred Equal to change in internal energy Cannot say

In a closed system, change in internal energy is 10 J and heat transferred to it is 10 J. What is the work done by the system?

0

10 J

-20 J

20 J

In an open, steady-state adiabatic process, if the change in kinetic energy is 10 J and change in potential energy is 15 J, what is the work done by the system?

10 J

15 J

25 J

-25 J

In an open, steady-state system, if the heat transferred is 10 J and work done by the system is 5 J, what is the change in potential energy (neglect kinetic energy)?

5 J

-5J

15 J

-15 J

For an ideal gas isobaric process at pressure 1 Pa, the volume of the gas changes from 1 m^3 to 5 m^3. What is the work done by the gas?

1 J

4 J

5 J

10 J

For an ideal gas isothermal process, what is the work done by the gas from 1 m^3 to 2 m^3 at 300 K?

0.69 kJ

1.24 kJ

1.73 kJ

2.45 kJ

For an ideal gas isothermal process, what is the work done by the gas from 4 Pa to 1 Pa at 300 K?

1.22 kJ

2.15 kJ

2.83 kJ

3.45 kJ

For an ideal gas isobaric process, what is the work done by the gas from 2 m^3 to 0.5 m^3 at 2 Pa?

-3 J

3 J

-5 J

5 J

If the system is insulated, the process might be

Isothermal

Isobaric

Isochoric

What is the work done for an isobaric process?

P∆V

V∆P

PV

None of the above

For an ideal gas isochoric process, what is the work done by the gas from 2 Pa to 1 Pa?

0

1 J

200 J

None of the above

Which of the following is true for isothermal ideal gases?

∆T = 0

∆U = 0

∆H = 0

All of the above

Quiz/Test Summary
Title: Energy Balances Applications in the Absence of Chemical Reactions
Questions: 15
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