Incorrect. Steam can cause more severe burns than water, even if both are at the same temperature. Calculate the amount of heat released from 23 g of steam at 100.0°C as it cools to 37°C (body temperature), and the amount of heat released from 23 g of water at 100.0 °C as it cools to 37 °C. The AHvaporization Of water is 43.9 kJ mol1 and the specific heat of water is 4.184 Jg1°C-1. The heat content of 23 g of water at 100°C cooling to 37°C is i 84. kJ. The heat released when 23 g of water vapor at 100°C cools to 37°C is i ! kJ.

Incorrect. Steam can cause more severe burns than water, even if both are at the same temperature. Calculate the amount of heat released from 23 g of steam at 100.0°C as it cools to 37°C (body temperature), and the amount of heat released from 23 g of water at 100.0 °C as it cools to 37 °C. The AHvaporization Of water is 43.9 kJ mol1 and the specific heat of water is 4.184 Jg1°C-1. The heat content of 23 g of water at 100°C cooling to 37°C is i 84. kJ. The heat released when 23 g of water vapor at 100°C cools to 37°C is i ! kJ.

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter10: Energy

Section: Chapter Questions

Problem 44QAP: When ethanol (grain alcohol, is burned in oxygen, approximately 1360 kJ of heat energy is released...

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When ethanol (grain alcohol, is burned in oxygen, approximately 1360 kJ of heat energy is released per mole of ethanol. mg src=Images/HTML_99425-10-44QAP_image002.jpg alt="" align="top"/> What quantity of heat is released for each gram of ethanol burned? i>What is for the reaction as written? How much heat is released when sufficient ethanol is burned so as to produce 1 mole of water vapor?
9.95 How much heat is required to convert 250 g of water from liquid at 23°C: into steam at 107°C? (The necessary heat capacities and enthalpy changes can be found in the chapter or online.)
9.49 Hvap=31.3 kJ/mol for acetone. If 1.40 kg of water were vaporized to steam in a boiler, how much acetone (in kg) would need to be vaporized to use the same amount of heat?
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