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Explain why a steam burn from gaseous water at 100 °C is worse than a water burn

Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro ISBN: 9780321910295 34

Solution for problem 17Q Chapter 12

Introductory Chemistry | 5th Edition

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Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro

Introductory Chemistry | 5th Edition

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Problem 17Q

PROBLEM 17Q

Explain why a steam burn from gaseous water at 100 °C is worse than a water burn involving the same amount of liquid water at 100 °C.

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Solution 17Q

Burns or, more accurately, burn effects (blisters, redness, etc) are caused by heat, not temperature. The short answer is that steam at 100 C contains more heat than water at 100 C. Thus more, and more severe, burn effects come from the steam than from the water.

The reason steam has more heat, in the same amount of mass, is because water takes on additional heat to change from its liquid state into its gas state (i.e., into steam). That is, up to 100 C the heat raises the temperature of the water. But at 100 C, as the water changes to steam, more heat is added without changing the temperature.

That extra heat is called the heat of vaporization...it stays stored in the steam as a latent heat that will be released when the steam liquefies. And that extra heat is passed on into your body as the steam condenses on your skin. That extra, latent heat is why the burn effects are more severe.

When water at 100 degree C is converted into steam at 100 degree C, an additional heat energy of 540 Calories per gram of water is utilised. Hence, the energy possessed by steam is much higher than that of boiling water at 100 degree C. This additional energy (which is called "LATENT HEAT OF STEAM) is the cause of the severe burn.

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Chapter 12, Problem 17Q is Solved
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Textbook: Introductory Chemistry
Edition: 5
Author: Nivaldo J Tro
ISBN: 9780321910295

This full solution covers the following key subjects: Water, burn, liquid, Gaseous, explain. This expansive textbook survival guide covers 19 chapters, and 2046 solutions. This textbook survival guide was created for the textbook: Introductory Chemistry, edition: 5. Since the solution to 17Q from 12 chapter was answered, more than 395 students have viewed the full step-by-step answer. The answer to “Explain why a steam burn from gaseous water at 100 °C is worse than a water burn involving the same amount of liquid water at 100 °C.” is broken down into a number of easy to follow steps, and 27 words. Introductory Chemistry was written by and is associated to the ISBN: 9780321910295. The full step-by-step solution to problem: 17Q from chapter: 12 was answered by , our top Chemistry solution expert on 05/06/17, 06:45PM.

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Explain why a steam burn from gaseous water at 100 °C is worse than a water burn