Pentane molecules are held by weak van der waal's forces which require less energy to break hence low boiling point. Ethanol acid molecules are held hydrogen bonds which are strong and require more energy to break hence high boiling point.
johnmulu answered the question on June 7, 2017 at 08:59
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The structure below represents a type of a cleansing agent.
Describe how the cleansing agent removes grease from a piece of cloth.
Date posted: June 7, 2017. Answers (1)
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Study the flow chart below and use it to answer the questions that follow:
(i) Identify the organic compound K.
(ii) Write the formula of M
(iii) Give one reagent that can be used in:
(I) Step I; (II) step II
Date posted: June 7, 2017. Answers (1)
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Study the flow chart below and answer the questions that follow.
(i) (I) What is observation will be made in step I?
(II) Describe a chemical test that can be carried out to show the identity of compound C.
(ii) Give the names of the following: I. E II. Substance D.
Date posted: June 7, 2017. Answers (1)
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Study the flow chart below and answer the questions that follow.
(i) Name the compounds:
(I) L
(II) N
(ii) Give the reagent and the condition used in step 1.
(iii) State the type of reaction that takes place in:
(I) Step 2; (II) step 3;
Date posted: June 7, 2017. Answers (1)
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Date posted: June 7, 2017. Answers (1)
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Date posted: June 7, 2017. Answers (1)
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Use the flow chart below to answer the questions that follow.
(i) Name:
(I) The type of reaction that occurs in step II;
(II) Substance B.
(ii) Give the formula of substance C.
Date posted: June 7, 2017. Answers (1)
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The table below gives the formula of four compounds L, M, N and P.
Giving a reason in each case, select the letter which represents a compound that:
(i) Decolorizes bromine in the absence of UV light.
(ii) Gives effervescence when reacted with aqueous sodium carbonate.
Date posted: June 7, 2017. Answers (1)
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Study the flow chart below and answer the questions that follow.
(i) State the conditions for the reaction in Step I to occur.
(ii) Identify substance J.
(iii) State one disadvantage of the continued use of substance such as J.
Date posted: June 7, 2017. Answers (1)
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Give the name of two organic compounds that can be used to prepare this compound in the laboratory.
Date posted: June 7, 2017. Answers (1)
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The structure of a detergent is.
(a) Write the molecular formular of the detergent.
(b) What type of detergent is represented by the formula?
Date posted: June 7, 2017. Answers (1)
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Ethanol obtained from glucose can be converted to ethene as shown below;
Name and describe the process that takes place in steps I and II.
Date posted: June 7, 2017. Answers (1)
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The table below shows the relative molecular masses and the boiling points of pentane and propan-1-o1
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Date posted: May 25, 2017. Answers (1)
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Propane can be changed into methane and ethane as shown in the equation below.
Name the process undergone by propane
Date posted: May 25, 2017. Answers (1)
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(Solved)
Study the flow chart below and answer the questions that follow
(i) Identify reagent L.
(ii) Name the catalyst used in step 5.
(iii) What name is given to the process that takes place in step 5?
Date posted: May 25, 2017. Answers (1)
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Study the information in the table below and answer the questions that follow.
Give a reason why the difference in the molar heats of combustion between successive alcohols are close.
Date posted: May 25, 2017. Answers (1)
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The flow chart below shows a series of reactions starting with ethanol. Study it and answer the questions that follow.
(i) Name: I. Process A. II. Substances B and C
(ii) Explain why it is necessary to use high pressure to change gas B into the polymer.
Date posted: May 25, 2017. Answers (1)
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The structures below represents a portion of a polymer.
Give:
(a) The name of the polymer.
(b) One industrial use of the polymer.
Date posted: May 25, 2017. Answers (1)
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Study the scheme given below and answer the questions that follow.
(i) Name processes I and II
(ii) Identify the products A and B.
(iii) Name one catalyst used in process II.
Date posted: May 25, 2017. Answers (1)
- Ethane and Ethene react with bromine according to the equation given below. (Solved)
Ethane and Ethene react with bromine according to the equation given below.
(i) $C_2H_6(g) \; + \; Br_2(g) \rightarrow C_2H_5Br_2(g) + HBr(g)$
(ii) $C_2H_4(g) \; +\; Br_2(g) \rightarrow C_2H_4Br_2(l)$
Name the type of bromination reaction that takes place in: (i) and (ii).
Date posted: May 25, 2017. Answers (1)