The following information is given for lead at 1atm: Tb = 1740.00°C Tm 328.00°C Specific heat solid = 0.1300 J/g °C Specific heat liquid = 0.1380 J/g °C AHvap (1740.00°C) = 858.2 J/g AHfus (328.00°C) = 23.00 J/g A 49.80 g sample of liquid lead at 482.00°C is poured into a mold and allowed to cool to 27.00°C. How many kJ of energy are released in this process? (Report the answer as a positive number.) Energy = KJ

The following information is given for lead at 1atm: Tb = 1740.00°C Tm 328.00°C Specific heat solid = 0.1300 J/g °C Specific heat liquid = 0.1380 J/g °C AHvap (1740.00°C) = 858.2 J/g AHfus (328.00°C) = 23.00 J/g A 49.80 g sample of liquid lead at 482.00°C is poured into a mold and allowed to cool to 27.00°C. How many kJ of energy are released in this process? (Report the answer as a positive number.) Energy = KJ

Chemistry & Chemical Reactivity

9th Edition

ISBN:9781133949640

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter20: Environmental Chemistry-earth's Environment, Energy, And Sustainability

Section: Chapter Questions

Problem 18PS: The enthalpy of combustion of isooctane (C8H18), one of the many hydrocarbons in gasoline, is 5.45 ...

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Equal masses of liquid A, initially at 100C, and liquid B, initially at 50C, are combined in an insulated container. The final temperature of the mixture is 80C. All the heat flow occurs between the two liquids. The two liquids do not react with each other. Is the specific heat of liquid A larger than, equal to, or smaller than the specific heat of liquid B?
The enthalpy of combustion of isooctane (C8H18), one of the many hydrocarbons in gasoline, is 5.45 103 kJ/mol. Calculate the enthalpy change per gram of isooctane and per liter of isooctane (d = 0.688 g/mL).
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