Virtual Labs

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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

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Feedback

Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Contributors

Feedback

To determine the boiling points of pure species under different pressures

Choose difficulty:

Beginner

Intermediate

Advanced

What condition indicates that you should stop increasing the heating rate?

a: When the pressure reaches maximum Explanation

Explanation

b: When the cold-water temperature stabilizes Explanation

Explanation

c: When small increments in heating rate don't raise the temperature Explanation

Explanation

d: When the drop rate reaches 100 drops per minute Explanation

Explanation

What is the optimal drop rate that should be maintained?

a: 5 to 10 drops per minute Explanation

Explanation

b: 60 to 70 drops per minute Explanation

Explanation

c: 100 to 125 drops per minute Explanation

Explanation

d: There is no such requirement/condition. Explanation

Explanation

how should the heating rate be adjusted?

a: Increase rapidly to save time Explanation

Explanation

b: Increase slowly and allow system to accommodate change Explanation

Explanation

c: Give constant change throughout the experiment Explanation

Explanation

d: Quick increase then decrease gradually until temperature stabilizes Explanation

Explanation

What should be done before starting the vacuum pump?

a: Reduce heating rate Explanation

Explanation

b: Calculate pressure based on manometer value Explanation

Explanation

c: Shut down the heat supply Explanation

Explanation

d: Start the nitrogen purge Explanation

Explanation

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