Concept explainers
Methane is a major component of purified natural gas used for heating and cooking. When 1.0 mole of methane gas burns with oxygen to produce carbon dioxide and water, 883 kJ is produced. Methane gas has a density of 0.715 gIL at STP. For transport, the natural gas is cooled to —163 C to form liquefied natural gas (LNG) with a density of 0.45 g/mL. A tank on a ship can hold 7.0 million gallons of LNG. (2.1, 2.7, 3.4, 6.7, 6.9, 7.7, 7.8, 7.9, 8.6)
An LNG carrier transports liquefied natural gas.
a. Draw the Lewis structure for methane, which has the formula CH4.
b. What is the mass, in kilograms, of LNG (assume that LNG is all methane) transported in one tank on a ship?
c. What is the volume, in liters, of LNG (methane) from one tank when the LNG is converted to gas at STP?
d. Write a balanced chemical equation for the combustion of methane in a gas burner, including the heat of reaction.
e. How many kilograms of oxygen are needed to react with all of the methane provided by one tank of LNG?
f. How much heat, in kilojoules, is released from burning all of the methane In one tank of LNG?
Methane is the fuel burned in a gas cooktop.
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Chapter 9 Solutions
CHEMISTRY: AN INTRODUCTION TO GENERAL, O
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