energy and rates practice test answers
... For which one of the following substances is the standard enthalpy of formation, H°f, equal to zero? a. water [H2O(l)] d. carbon dioxide [CO2(g)] b. lead [Pb(s)] e. tin [Sn(g)] c. carbon dioxide [CO2(s)] Use the following data to determine the ΔH of vaporization for silicon tetrachloride at its boil ...
... For which one of the following substances is the standard enthalpy of formation, H°f, equal to zero? a. water [H2O(l)] d. carbon dioxide [CO2(g)] b. lead [Pb(s)] e. tin [Sn(g)] c. carbon dioxide [CO2(s)] Use the following data to determine the ΔH of vaporization for silicon tetrachloride at its boil ...
PPT - Unit 5
... 2. Given the following data: -(C2H2(g) + 5/2O2(g) → 2CO2(g) + H2O(l) ΔH = -1300. kJ) 2( C(s) + O2(g) → CO2(g) ) 2(ΔH = -394 kJ) H2(g) + 1/2O2(g) → H2O(l) ΔH = -286 kJ Calculate ΔH for the following reaction: 2C(s) + H2(g) → C2H2(g) 2C(s) + 2O2(g) → 2CO2(g) ΔH = -788 kJ 2CO2(g) + H2O(l) → C2H2(g) + ...
... 2. Given the following data: -(C2H2(g) + 5/2O2(g) → 2CO2(g) + H2O(l) ΔH = -1300. kJ) 2( C(s) + O2(g) → CO2(g) ) 2(ΔH = -394 kJ) H2(g) + 1/2O2(g) → H2O(l) ΔH = -286 kJ Calculate ΔH for the following reaction: 2C(s) + H2(g) → C2H2(g) 2C(s) + 2O2(g) → 2CO2(g) ΔH = -788 kJ 2CO2(g) + H2O(l) → C2H2(g) + ...
AROMATIC COMPOUNDS
... Cyclobutadiene and cyclooctatetraene are NOT AROMATIC, because they have an even number of p electron pairs ...
... Cyclobutadiene and cyclooctatetraene are NOT AROMATIC, because they have an even number of p electron pairs ...
Organic Chemistry IB Organic Chemistry 2016
... • (i) Identify two functional groups present in all three of these analgesics. • (ii)Identify one functional group present in morphine, but not in diamorphine. ...
... • (i) Identify two functional groups present in all three of these analgesics. • (ii)Identify one functional group present in morphine, but not in diamorphine. ...
Ch03_ Lecture
... • This group is called a “carbonyl group”. • The polar C-O bond makes the carbonyl carbon an electrophile, while the lone pairs on O allow it to react as a nucleophile and base. • The carbonyl group also contains a bond that is more easily broken than a C-O s bond. ...
... • This group is called a “carbonyl group”. • The polar C-O bond makes the carbonyl carbon an electrophile, while the lone pairs on O allow it to react as a nucleophile and base. • The carbonyl group also contains a bond that is more easily broken than a C-O s bond. ...
Slide 1
... an “-OH” group. – The “-OH” group is called a hydroxyl group. – There are three kinds of alcohols: 1). Primary alcohol – one “R” group attached to the C-OH 2). Secondary alcohol – two“R” groups attached to the C-OH 3). Tertiary alcohol – three “R” groups attached to the C-OH ...
... an “-OH” group. – The “-OH” group is called a hydroxyl group. – There are three kinds of alcohols: 1). Primary alcohol – one “R” group attached to the C-OH 2). Secondary alcohol – two“R” groups attached to the C-OH 3). Tertiary alcohol – three “R” groups attached to the C-OH ...
Activity Series Unit
... 29. Generally speaking, what happens to these species in these reactions? They are gaining electrons from the metals. 30. When looking at electrons, what can be said about the term, reduction? Reduction means the gain of electrons. 31. In these reactions what species is causing reduction? What spec ...
... 29. Generally speaking, what happens to these species in these reactions? They are gaining electrons from the metals. 30. When looking at electrons, what can be said about the term, reduction? Reduction means the gain of electrons. 31. In these reactions what species is causing reduction? What spec ...
Enzymes: “Helper” Protein molecules
... Enzymes aren’t used up Enzymes are not changed by the reaction used only temporarily re-used again for the same reaction with other molecules very little enzyme needed to help in many reactions ...
... Enzymes aren’t used up Enzymes are not changed by the reaction used only temporarily re-used again for the same reaction with other molecules very little enzyme needed to help in many reactions ...
Chemistry and the material world
... Answer: at 25° C the reaction occurs spontaneously (it is exergonic) ...
... Answer: at 25° C the reaction occurs spontaneously (it is exergonic) ...
Organic Chemical Reactions
... sometimes that of the transition states. A mechanism of a reaction must fit all the experimental data, first of all the chemical nature of the formed products. The gross mechanism of most common organic reactions is today known. However, many details are still unknown, due to the large number of var ...
... sometimes that of the transition states. A mechanism of a reaction must fit all the experimental data, first of all the chemical nature of the formed products. The gross mechanism of most common organic reactions is today known. However, many details are still unknown, due to the large number of var ...
Template for calculating the ΔH° in a multiple step chemical reaction
... To make Al2O3, you need the O3 from Fe2O3. To do that, you must first carry out the process of breaking up the Fe2O3, which has its own enthalpy of formation. However we are not forming Fe2O3. We are decomposing it. So, we must reverse the equation. Fe2O3 → 2Fe(s) + 3/2 O2 (g) Since the equation is ...
... To make Al2O3, you need the O3 from Fe2O3. To do that, you must first carry out the process of breaking up the Fe2O3, which has its own enthalpy of formation. However we are not forming Fe2O3. We are decomposing it. So, we must reverse the equation. Fe2O3 → 2Fe(s) + 3/2 O2 (g) Since the equation is ...
Reactions and Balancing
... Steps to Balancing Equations There are four basic steps to balancing a chemical equation. 1. Write the correct formula for the reactants and the products. DO NOT TRY TO BALANCE IT YET! You must write the correct formulas first. **And most importantly, once you write them correctly DO NOT ...
... Steps to Balancing Equations There are four basic steps to balancing a chemical equation. 1. Write the correct formula for the reactants and the products. DO NOT TRY TO BALANCE IT YET! You must write the correct formulas first. **And most importantly, once you write them correctly DO NOT ...
Organic Halides
... A hemiacetal can react with an alcohol under acidic conditions to form an acetal, and can dissociate to form an aldehyde and an alcohol. Hemiacetals can be converted acetals: Hemiacetal + alcohol +acid(catalyst) acetal + water An aldehyde dissolved in water exists in equilibrium with low concentra ...
... A hemiacetal can react with an alcohol under acidic conditions to form an acetal, and can dissociate to form an aldehyde and an alcohol. Hemiacetals can be converted acetals: Hemiacetal + alcohol +acid(catalyst) acetal + water An aldehyde dissolved in water exists in equilibrium with low concentra ...
A Straightforward Route to Enantiopure Pyrrolizidines and
... attractive electrophiles in SN2-type reactions possessing the properties mentioned above: the three chlorine atoms should, on the one hand, strongly activate due to their powerful electron-withdrawing abilities. The trichloromethyl group on the other hand was hoped to behave like a tert-butyl moiety ...
... attractive electrophiles in SN2-type reactions possessing the properties mentioned above: the three chlorine atoms should, on the one hand, strongly activate due to their powerful electron-withdrawing abilities. The trichloromethyl group on the other hand was hoped to behave like a tert-butyl moiety ...
Organic Chemistry Fifth Edition
... this is known as the rate determining step. The overall reaction cannot go faster than this step. Thus, the reaction is a SN1 reaction. ...
... this is known as the rate determining step. The overall reaction cannot go faster than this step. Thus, the reaction is a SN1 reaction. ...
Synthesis Reaction
... I can write chemical reactions by interpreting word equations I can classify reaction types (synthesis, decomposition, single replacement, double replacement, combustion) I can predict the products of chemical reactions in writing complete chemical equations (synthesis, decomposition, single replace ...
... I can write chemical reactions by interpreting word equations I can classify reaction types (synthesis, decomposition, single replacement, double replacement, combustion) I can predict the products of chemical reactions in writing complete chemical equations (synthesis, decomposition, single replace ...
Document
... I can write chemical reactions by interpreting word equations I can classify reaction types (synthesis, decomposition, single replacement, double replacement, combustion) I can predict the products of chemical reactions in writing complete chemical equations (synthesis, decomposition, single replace ...
... I can write chemical reactions by interpreting word equations I can classify reaction types (synthesis, decomposition, single replacement, double replacement, combustion) I can predict the products of chemical reactions in writing complete chemical equations (synthesis, decomposition, single replace ...
Asymmetric induction
Asymmetric induction (also enantioinduction) in stereochemistry describes the preferential formation in a chemical reaction of one enantiomer or diastereoisomer over the other as a result of the influence of a chiral feature present in the substrate, reagent, catalyst or environment. Asymmetric induction is a key element in asymmetric synthesis.Asymmetric induction was introduced by Hermann Emil Fischer based on his work on carbohydrates. Several types of induction exist.Internal asymmetric induction makes use of a chiral center bound to the reactive center through a covalent bond and remains so during the reaction. The starting material is often derived from chiral pool synthesis. In relayed asymmetric induction the chiral information is introduced in a separate step and removed again in a separate chemical reaction. Special synthons are called chiral auxiliaries. In external asymmetric induction chiral information is introduced in the transition state through a catalyst of chiral ligand. This method of asymmetric synthesis is economically most desirable.