推 yp7464 :po 期中考阿 !!!! 小考幫助不大吧 ㄎ 11/12 21:03
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課程名稱︰普通化學甲上
課程性質︰必修
課程教師︰林萬寅
開課學院：工學院
開課系所︰化學工程學系
考試日期（年月日）︰2011/10/26
考試時限（分鐘）：約15分鐘
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題
Elemental analysis of a hydrocarbon X (CxHy) gives 0.40 mol CO2 and 0.50
mol H2O. The vapor density of X is 1.81 times that of oxygen at the same
pressure andtemperature. In a combustion experiment, a mixture of 0.25 mol X
and 1.30 mol O2 is ignited to give 0.72 mol CO2 (the other product is H2O).
Assume no other byproducts are present. Answer the following questions.
(C = 12.0; = 1.0; O = 16.0)
1. Give the empirical formula of the hydrocarbon X. 10%
2. Find the molar mass of X. 10%
3. Give the molecular formula of X. 10%
4. Write the balanced equation for the combustion of X to form CO2 and H2O.
15%
5. What is the limiting reagent for the combustion reaction? 25%
6. What is the theoretical yield (in mol) of the product CO2? 10%
7. Calculate the percent yield of CO2. 10%
8. Find the mol of H2O actually formed in the combustion experiment. 10%:
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