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Explain how good thermal contact with liquid nitrogen can

Chapter 34, Problem 25

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QUESTION:

Problem 25CQ

Explain how good thermal contact with liquid nitrogen can keep objects at a temperature of 77 K (liquid nitrogen’s boiling point at atmospheric pressure).

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QUESTION:

Problem 25CQ

Explain how good thermal contact with liquid nitrogen can keep objects at a temperature of 77 K (liquid nitrogen’s boiling point at atmospheric pressure).

ANSWER:

Solution 25CQ

Step 1 of 2

The boiling point of liquid nitrogen under atmospheric conditions is 77 K. So when liquid nitrogen is slow boiled, we obtain a constant temperature of 77 K, which is maintained till the last drop of liquid nitrogen is boiled off.

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