28 A of ice at 0.0 °C is to a of at8 A 45-g piece of ice at 0.0 °C is added to a sample of water at8.0 °C. All of the ice melts and the temperature of the waterdecreases to 0.0 °C. How many grams of water were in thesample? (3.6, 3.7)oil in kcal/g? (3.5, 3.6)9 In a large building, oil is used in a steam boiler heating system.The combustion of 1.0 lb of oil provides 2.4 × 107 J. (3.4, 3.6)a. How many kilograms of oil are needed to heat 150 kg ofwater from 22 °C to 100 °C?b. How many kilograms of oil are needed to change 150 kg ofwater to steam at 100 °C?00 When 1.0 g of gasoline burns, it releases 11 kcal. The densityof gasoline is 0.74 g/mL. (3.4, 3.6)a. How many megajoules are released when 1.0 gal of gaso-line burns?b. If a television requires 150 kJ/h to run, how many hourscan the television run on the energy provided by 1.0 gal ofgasoline?ISWERSwers to Selected Practice Problemsa. elementb. compoundd. compoundc. elemente. compounda. pure substance

Heat absorbed by ice for melting = heat released by water Heat absorbed by ice for melting = mass…

oil in kcal/g? (3.5, 3.6) 8 A 45-g piece of ice at 0.0 °C is added to a sample of water at 8.0 °C. All of the ice melts and the temperature of the water decreases to 0.0 °C. How many grams of water were in he sample? (3.6, 3.7) hoating system

oil in kcal/g? (3.5, 3.6) 8 A 45-g piece of ice at 0.0 °C is added to a sample of water at 8.0 °C. All of the ice melts and the temperature of the water decreases to 0.0 °C. How many grams of water were in he sample? (3.6, 3.7) hoating system

Chemistry by OpenStax (2015-05-04)

1st Edition

ISBN:9781938168390

Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Chapter5: Thermochemistry

Section: Chapter Questions

Problem 34E: A teaspoon of the carbohydrate sucrose (common sugar) contains 16 Calories (16 kcal). What is the...

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Question

28 A of ice at 0.0 °C is to a of at
8 A 45-g piece of ice at 0.0 °C is added to a sample of water at
8.0 °C. All of the ice melts and the temperature of the water
decreases to 0.0 °C. How many grams of water were in the
sample? (3.6, 3.7)
oil in kcal/g? (3.5, 3.6)
9 In a large building, oil is used in a steam boiler heating system.
The combustion of 1.0 lb of oil provides 2.4 × 107 J. (3.4, 3.6)
a. How many kilograms of oil are needed to heat 150 kg of
water from 22 °C to 100 °C?
b. How many kilograms of oil are needed to change 150 kg of
water to steam at 100 °C?
00 When 1.0 g of gasoline burns, it releases 11 kcal. The density
of gasoline is 0.74 g/mL. (3.4, 3.6)
a. How many megajoules are released when 1.0 gal of gaso-
line burns?
b. If a television requires 150 kJ/h to run, how many hours
can the television run on the energy provided by 1.0 gal of
gasoline?
ISWERS
wers to Selected Practice Problems
a. element
b. compound
d. compound
c. element
e. compound
a. pure substance

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