Energy in Chemical Reactions Practice Questions

Question 1

What is the definition of the Enthalpy of Reaction?

Question 2

Which of the following reactions needs to be reversed to solve for the Heat of Neutralization between Hydrochloric Acid and Ammonia?

Question 3

What is the molar heat of neutralization (Enthalpy of Reaction) in kJ/mol if 5 moles of HA neutralized 5 moles of BOH and released 8173 J of heat?

 Question 4

Calculate the molar heat of neutralization in kJ/mol of the reaction between HA and BOH given the following information:

The temperature change equals 10C,

50 mL of 1 M concentration of Acid

50 mL of 1 M concentration of Base

Heat capacity of the calorimeter is 6.5 J/C.

Remember that the specific heat of water is 4.18 J/gC

Question 5

How much heat is gained (in Joules) by the water where a chemical reaction takes place in 100 mL aqueous solution and has a temperature increase of 14 C?

Question 6

What is the wavelength of light (in nm) if the frequency is 5.3 x 10^14 (1/sec)?

Question 7

What is the wavelength of light (in nm) if the energy of the wave is 1.62 x 10^-19 J?

Question 8

What is the final concentration of a solution if 144-mL of a 4.7-M solution was diluted to 412-mL?

Question 9

What is the final concentration of a solution if 15-mL of a 3.0-M solution was diluted to 100-mL and this process was repeated two more times?

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