The product which is formed by the dehydrogenation of propane should be determined along with its name and structural formula. Concept Introduction: The chemical reaction which involves the removal of hydrogen atom from an organic molecule is known as dehydrogenation. This reaction is a reverse of hydrogenation. In this reaction, alkanes are converted into olefins which are more reactive than alkanes. Rules for naming alkenes or olefins are: First choose the longest continuous chain of carbon atoms having double bond known as parent chain. The numbering of parent chain should be done in a way that the double bond and substituents get the lowest number. The root name of the carbon chain is same as in case of alkanes, but “−ane” ending is replaced by “−ene”. The appropriate name should be given to every alkyl group and denote its position on the parent chain with the number. The alkyl groups are written in alphabetical order.

Question

3.2 32 Consider calibrating a calorimeter and measuring heat transferred. A sample of compound was burned in a calorimeter and a temperature change of 3.33°C recorded. When a 1.23 A current from a 12.0 V source was passed through a heater in the same calorimeter for 156 s, the temperature changed of 4.47°C was recorded. 3.2.1 Calculate the heat supplied by the heater. 3.2.2 Calculate the calorimeter constant. 3.2.3 Calculate the heat released by the combustion reaction.

Answer 1

Question

Chapter 20, Problem 3ALQ

Interpretation Introduction

Interpretation:

The product which is formed by the dehydrogenation of propane should be determined along with its name and structural formula.

Concept Introduction:

The chemical reaction which involves the removal of hydrogen atom from an organic molecule is known as dehydrogenation. This reaction is a reverse of hydrogenation. In this reaction, alkanes are converted into olefins which are more reactive than alkanes.

Rules for naming alkenes or olefins are:

First choose the longest continuous chain of carbon atoms having double bond known as parent chain.

The numbering of parent chain should be done in a way that the double bond and substituents get the lowest number.

The root name of the carbon chain is same as in case of alkanes, but “−ane” ending is replaced by “−ene”.

The appropriate name should be given to every alkyl group and denote its position on the parent chain with the number.

The alkyl groups are written in alphabetical order.

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