Chapter 9: 83E (page 343)
What is incomplete combustion of fossil fuels? Why can this be a problem?
Incomplete combustion of fossil fuel leads to the production of carbon monoxide. Increase in carbon monoxide leads to serious threat to the environment.
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Consider the reaction
Calculate the heat when 100.0 mL of 0.500 M HCl is mixed with 300.0 mL of 0.100M . Assuming that the temperature of both solutions was initially and that the final mixture has a mass of 400.0 g and a specific heat capacity of , calculate the final temperature of the mixture.
In a coffee cup calorimeter, 50.0 mL of 0.100M and 50.0 mL of 0.100MHCl are mixed. The following reaction occurs:
If the two solutions are initially at , and if the final temperature is , calculate for the reaction in of AgCl formed. Assume a mass of 100.0 g for the combined solution and a specific heat capacity of .
Nitrogen gas reacts with hydrogen gas to form ammonia gas. Consider the reaction betweennitrogen and hydrogen as depicted below:
a. Draw what the container will look like after the reaction has gone to completion. Assume a constant pressure of 1 atm.
b. Is the sign of work positive or negative, or is the value of work equal to zero for the reaction? Explain your answer
You have a 1.00-mole sample of water at-30.oC, and you heat it until you have gaseous water at 140.oC. Calculate qfor the entire process. Use the following data:
Specific heat capacity of ice=2.03 J oC-1g-1
Specific heat capacity of water=4.18 J oC-1g-1
Specific heat capacity of steam=2.02 J oC-1g-1
High-quality audio amplifiers generate large amounts of heat. To dissipate the heat and prevent damage to the electronic devices, manufacturers use heat-radiating metal fins. Would it be better to make these fins out of iron or aluminum? Why? (See Table 9.3 for specific heat capacities.)
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