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Week 14 Tuesday Quiz

Quiz by Kari Stone

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8 questions
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  • Q1

    The volume of a gas is proportional to the temperature of a gas is known as:

    Ideal Gas Law

    Boyle's Law

    Dalton's Law

    Avogadro's Law

    Charles's Law

    300s
  • Q2

    A 0.465 g sample of an unknown compound occupies 245 mL at 298 K and 1.22 atm.  What is the molar mass of the unknown compound in g/mol?

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    300s
  • Q3

    Which of the following signs on q and w represent a system that is doing work on the surroundings, as well as losing heat to the surroundings?

    q = -, w = +

    q = +, w = +

    q = +, w = -

    q = - , w = -

    300s
  • Q4

    A piece of iron (C=0.449 J/g°C) and a piece of gold (C=0.128 J/g°C) have identical masses.  If the iron has an initial temperature of 498 K and the gold has an initial temperature of 298 K, which of the following statements is TRUE of the outcome when the two metals are placed in contact with one another?  Assume no heat is lost to the surroundings. 

    Since the two metals have the same mass, the final temperature of the two metals will be 398 K, exactly halfway between the two initial temperatures.

    Since the two metals have the same mass, the thermal energy contained in the iron and gold after reaching thermal equilibrium will be the same.

    Since the two metals have the same mass, the thermal energy contained in each metal after equilibrium will be the same.  

    Since the two metals have the same mass, but the specific heat capacity of gold is much smaller than that of iron, the final temperature of the two metals will be closer to 298 K than to 498 K.

    300s
  • Q5

    Which of the following substances (with specific heat capacity provided) would show the greatest temperature change upon absorbing 100.0 J of heat?

    10.0 g Ag, CAg = 0.235 J/g°C

    10.0 g Fe, CFe = 0.449 J/g°C

    10.0 g H2O, CH2O = 4.18 J/g°C

    10.0 g Au, CAu = 0.128 J/g°C

    300s
  • Q6

    Determine the specific heat capacity of an alloy that requires 59.3 kJ to raise the temperature of 150.0 g alloy from 298 K to 398 K in J/gC.

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    300s
  • Q7

    A 6.55 g sample of aniline (C6H5NH2, molar mass = 93.13 g/mol) was combusted in a bomb calorimeter.  If the temperature rose by 32.9°C, use the information below to determine the heat capacity of the calorimeter in kJ/C.

     

                4 C6H5NH2(l) + 35 O2(g) →  24 CO2(g) + 14 H2O(g) + 4 NO2(g)

                

                ΔH°rxn= -1.28 x 104 kJ

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    300s
  • Q8

    Which of the following processes is exothermic?

    the vaporization of water

    the chemical reaction in a "cold pack" often used to treat injuries

    the melting of ice

    the formation of dew in the morning

    300s

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