-O GASES Soling for a geseous neactant Jer of hydrocarbons such as heptane (C,H)

Question

-O GASES Soling for a geseous neactant Jer of hydrocarbons such as heptane (C,H) produces carbon dioxide, a "greenhouse gas." Greenhouse gases in the Earth 's Combustion atmosphere can trap the Sun's heat, raisi international discussion about whether to regulate the production of carbon dioxide ing the average temperature of the Earth. For this reason there has been a great deal of balanced chemical equation including physical state symbols for the 1. Write a combustion of liquid heptane into gaseous carbon dioxide and gaseous water 2. Suppose 0.160 kg of heptane are burned in air at a pressure of exactly I atm and a temperature of 18.0 °C. Calculate the volume of carbon dioxide gas that is produced. Be sure your answer has the correct number of significant digits

Explanation / Answer

q1

balance

C7H16 + O2 = CO2 + H2O

balance c

C7H16 + O2 = 7CO2 + H2O

balance H

C7H16 + O2 = 7CO2 + 8H2O

balance O

C7H16 + 11O2 = 7CO2 + 8H2O

add phases

C7H16(l) + 11O2(g) = 7CO2(g) + 8H2O(g)

Q2

mol of heptane :

mass= 0.16 kg = 160 g

mol = mass/MW = 160/100.2019 = 1.596 mol of heptane

mol of CO2 = 7*heptane= 7*1.596 = 11.172 mol of CO2

PV = nRT

V = nRT/P

V = (11.172)(0.082)(18+273)/(1) = 266.58 L

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