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Organic Chemistry
If 3.65g of butane is burned underneath a cup holding 1.00 L of water at 21.0o C, what will the final temperature of the water be (ΔHcomb = -3325 kJ/mol)? (3 marks)
Organic Chemistry
When 25.0 mL of 0.25 mol/L LiOH and 25.0 mL of 0.25 mol/L HCl are mixed together, the temperature warms 15.8o C. What is the molar enthalpy of neutralization for LiOH? (3 marks)
Organic Chemistry
Instant hot packs work by crystallizing sodium acetate (NaCH3COO). The molar enthalpy of crystallization for sodium acetate is -56.7 kJ/mol. How many grams of sodium acetate are needed to warm 125.0 mL of water from 21.0o C to 35.4o C? (3 marks)
Organic Chemistry
When 2.35g Mg(OH)2
is added to 250.0 mL of water, the temperature of the water
raises from 20.5o
C to 36.0o
C. Calculate the molar enthalpy of solution. (3 marks
is added to 250.0 mL of water, the temperature of the water
raises from 20.5o
C to 36.0o
C. Calculate the molar enthalpy of solution. (3 marks
Organic Chemistry
Metal A has a heat capacity of 0.450 J/go C while metal B has a heat capacity of 1.250 J/go C. If both metals are supplied with 1000.0 J of energy, which one will heat up more? Explain by describing what specific heat capacity defines
Organic Chemistry
Which is more stable in each pair given below give reasons for your answer
a)Coo- +NH or Coo-. +NH
b) Cl or Cl
a)Coo- +NH or Coo-. +NH
b) Cl or Cl
Organic Chemistry
My question pertains to NMR Spectroscopy. What is the difference between the molecular structure of 1-butanol and the signal relationship? Also does it have a shielding or dishielding effect?
Organic Chemistry
Use the concentration and rate data presented in the table below to answer the following questions about the hypothetical reaction:
A + 2B + 4C → 2D + E
Line [A] (mol/L) [B] (mol/L) [C] (mol/L) Rate (mol/L•s)
1 0.100 0.100 0.100 3.6 × 10–2
2 0.200 0.100 0.100 3.6 × 10–2
3 0.100 0.200 0.100 7.2 × 10–2
4 0.200 0.200 0.200 2.9 × 10–1
5 0.300 0.200 0.300 ?
a) Why would you expect this reaction to be a multi-step reaction, based on the overall reaction?
b) What is the order of the reaction, with respect to each reactant? All calculations that are used to determine the order of each reactant must be shown. Proper terminology and notation must be used.
c) What is the overall order of the reaction?
A + 2B + 4C → 2D + E
Line [A] (mol/L) [B] (mol/L) [C] (mol/L) Rate (mol/L•s)
1 0.100 0.100 0.100 3.6 × 10–2
2 0.200 0.100 0.100 3.6 × 10–2
3 0.100 0.200 0.100 7.2 × 10–2
4 0.200 0.200 0.200 2.9 × 10–1
5 0.300 0.200 0.300 ?
a) Why would you expect this reaction to be a multi-step reaction, based on the overall reaction?
b) What is the order of the reaction, with respect to each reactant? All calculations that are used to determine the order of each reactant must be shown. Proper terminology and notation must be used.
c) What is the overall order of the reaction?
Organic Chemistry
In comparison to inorganic compounds, there are many organic compounds. Which of the following statements best explains why carbon forms the basis of so many compounds?
a) Carbon atoms have a high electronegativity.
b) Carbon atoms combine easily with hydrogen.
c) Carbon readily forms covalent bonds with other carbon atoms.
d) Carbon will readily form many strong ionic bonds with other carbon atoms.
a) Carbon atoms have a high electronegativity.
b) Carbon atoms combine easily with hydrogen.
c) Carbon readily forms covalent bonds with other carbon atoms.
d) Carbon will readily form many strong ionic bonds with other carbon atoms.
Organic Chemistry
purpose of heating basic extract before precipitating benzoic acid
