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Thermochem 100

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If you feel warm after exercising, have you increased the ... Complete reaction between ammonium bromide and silver nitrate by writing a net ionic equation. ... – PowerPoint PPT presentation

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Title: Thermochem 100


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Thermochem 100
  • If you feel warm after exercising, have you
    increased the internal energy of your body?
    Explain.

3
Thermochem 200
  • Classify each of the following processes as
    exothermic or endothermic.
  • Freezing of Water
  • Digesting Food
  • Running
  • A person growing
  • Wood being chopped

4
Thermochem 300
  • Write a balanced equation for the combustion of 1
    mol of liquid methanol (CH3OH) and draw an
    approximate enthalpy diagram

5
Thermochem 400
  • Find q when 22.0 g of water is heated from 25 C
    to 100 C.

6
Thermochem 500
  • When 1 mol of KBr (s) decomposes to its elements,
    394 kJ of heat is absorbed. Write a balanced
    thermochemical equation for this reaction.

How much heat is released when 10.0 kg of KBr
forms from its elements?
7
Gases 100
  • Which effuses faster He or Ar?

8
Gases 200
  • Air is approximately 78 nitrogen gas and 21
    oxygen gas. Will balloons filled with the
    following sink or float?
  • Nitrogen?
  • Carbon dioxide?
  • Methane?

9
Gases 300
  • You fill an uninflated balloon with 15.0 g of dry
    ice. The balloons capacity is 7.5 L. Is the
    balloon likely to pop as the dry ice vaporizes?
    Assume the temperature is 298 K.

10
Gases 400
  • What is the effect of the following on the volume
    of 1 mol of ideal gas?
  • Both the pressure and temperature decrease to
    half of their original volumes.
  • Temperature increases from 250 C to 500 C.
  • One third of the gas leaks out.

11
Gases 500
  • An anesthetic gas contains 64.81 carbon, 13.60
    hydrogen and 21.59 oxygen by mass. If 2.00 L of
    the gas at 25 C and 0.420 atm weighs 2.57 g, what
    is the molecular formula of the anesthetic?

12
Chemical Reactions 100
  • Which of the following are likely to be very
    soluble in water?
  • Ethanol (CH2CH2OH)
  • Glycine (H2NCH2COOH)
  • Hexane
  • Benzene (C6H6)

13
Chemical Reactions 200
  • Identify the oxidizing and reducing agents in the
    following
  • 2 MnO4- (aq) 10 Cl- (aq) 16 H (aq) ?
  • 5 Cl2 (g) 2 Mn2 (aq) 8 H2O (l)

14
Chemical Reactions 300
  • How many moles and number of ions of each type
    are present in an aqueous solution of 130 ml 0.45
    M aluminum chloride?

15
Chemical Reactions 400
  • Complete reaction between ammonium bromide and
    silver nitrate by writing a net ionic equation.
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