1-A solution has a temperature change of 20 K. What is thetemperature change in degree Celsius?

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Question 2

Students used two thermometers in Thermo lab. If boththermometers consistently read temperature exactly 1.0 degreehigher than the actual temperature, how does this affect theexperimental molar heat of neutralization?

A-It has an unknown impact on the molar heat ofneutrailization.

B-This will make the molar heat of neutrailization higher

C-Since the temperature differences are used in allcaculations, this should not affect the molar heat ofneutralization

D-This will make the molar heat of neutrailizationlower

Question 3

Specific heat capacity of water is 4.184 J/(g C). What is itsmolar heat capacity?

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Question 4

50.0 mL of 2.00 mol/L HNO3 solution and 50.0 mL of 1.00 mol/LNaOH solution, both at 20.0 degree Celsius, were mixed in acalorimeter. Calculate the molar heat of neutralization of HNO3 inkJ/mol if:

(1) final temperature was 27.2 degree Celsius;

(2) the mass of the overall solution was 102.0 g;

(3) the heat capacity of the calorimeter was 25.0 J/C;

(4) and assume that the specific heat of solution is the same aswater, 4.184 J/(g C);

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Question 5

A solution of X was mixed with a solution of Y to react. Both Xand Y were at the same initial temperature. However, after thereaction, the combined solution got much hotter. Which one iscorrect about this reaction between X and Y?

A-Exothermic with positive enthalpy of reaction

B-Endothermic with negative enthalpy of reaction

C-Endothermic with positive enthalpy of reaction

D-Exothermic with negative enthalpy of reaction

Question 6

The lines observed in H-lamp are parts of Balmer Series. Allthese lines are due to a transition from various higher n value toa common n. What is this common lower n value for all these lines?(Hint: the information can be found around \"Calculations\" area onpage 8-67)

A- 0

B- 2

C- 1

D- 3

Question 7

Red and purple are two lines of hydrogen lamp. Which one iscorrect when comparing these two lines? Choose all that apply.

1-The light of red line travels faster than the purpleone.

2-Red line has smaller energy than the purple one.

3-Red line has longer wavelengthh than the purple one.

4-Red line has higher frequency than the purple one.

Question 8

Since we can only see visible lines from a hydrogen lamp,hydrogen lamp does not produce any UV light.

True

False

Question 9

Evaporation of water.........

1-is exothermic

2-has positive enthalpy change

3-is endothermic

4-has negative enthalpy change

Question 10

Which of the following transition in a hydrogen atom will end upreleasing the highest amount of energy?

A- n = 10 to n = 3

B- n = 1 to n = 2

C- n = 10 to n = 10000

D- n = 3 to n = 2