The enthalpy change of combustion per gram of N 2 H 4 and N 2 H 2 (CH 3 ) 2 has to be calculated. Concept Introduction: The standard enthalpy change of combustion of a compound is the enthalpy change which occurs when one gram of the compound is burned completely in oxygen under standard conditions, and with everything in its standard state. Δ r H 0 = ΣnΔ f H 0 (products) - ΣnΔ f H 0 (reactants) The change in enthalpy, ΔH in kJ per mole of a given reactant for the reaction can be calculated as: Δ r H= enthalpy change number of moles ΔH = Δ r H×number of moles
The enthalpy change of combustion per gram of N 2 H 4 and N 2 H 2 (CH 3 ) 2 has to be calculated. Concept Introduction: The standard enthalpy change of combustion of a compound is the enthalpy change which occurs when one gram of the compound is burned completely in oxygen under standard conditions, and with everything in its standard state. Δ r H 0 = ΣnΔ f H 0 (products) - ΣnΔ f H 0 (reactants) The change in enthalpy, ΔH in kJ per mole of a given reactant for the reaction can be calculated as: Δ r H= enthalpy change number of moles ΔH = Δ r H×number of moles
The enthalpy change of combustion per gram of N2H4 and N2H2(CH3)2 has to be calculated.
Concept Introduction:
The standard enthalpy change of combustion of a compound is the enthalpy change which occurs when one gram of the compound is burned completely in oxygen under standard conditions, and with everything in its standard state.
ΔrH0=ΣnΔfH0(products)-ΣnΔfH0(reactants)
The change in enthalpy, ΔH in kJ per mole of a given reactant for the reaction can be calculated as:
ΔrH=enthalpy changenumber of moles
ΔH=ΔrH×number of moles
Expert Solution & Answer
Answer to Problem 86GQ
The enthalpy change of combustion per gram of N2H4 is -8.919 J/gK and the enthalpy change of combustion per gram of N2H2(CH3)2 is -32.93J/gK
Part 1. Draw monomer units of the following products and draw their reaction mechanism
1) Bakelite like polymer
Using: Resorcinol + NaOH + Formalin
2) Polyester fiber
Using a) pthalic anhydride + anhydrous sodium acetate + ethylene glycol
B)pthalic anhydride + anhydrous sodium acetate + glycerol
3) Temporary cross-linked polymer
Using: 4% polyvinyl alcohol+ methyl red + 4% sodium borate
Using the table of Reactants and Products provided provide the correct letter that
corresponds with the Carboxylic acid that is formed in the reaction below.
6 M NaOH
Acid-workup
WRITE THE CORRECT LETTER ONLY DO NOT WRITE EXTRA WORDS OR
PHRASES
A)
Pool of Reagents for Part B
CI
B)
OH
C)
E)
CI
J)
racemic
F)
K)
OH
N)
OH
P)
G)
OH
D)
HO
H)
L)
M)
HO
Q)
R)
CI
A
In the table below, the exact chemical structures for Methyl salicylate can be
represented by the letter
WRITE THE CORRECT LETTER ONLY DO NOT WRITE EXTRA WORDS OR
PHRASES
CI
B)
A)
E)
Cl
racemic
F)
J)
CI
K)
N)
OH
P)
Pool of Reagents for Part B
OH
OH
G)
L)
OH
D)
HO
H)
M)
HO
Q)
R)
CI
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