Consider the combustion of propane: A balloon is being inflated to its full extent by heating the air inside it. In the final stages of this process, the volume of the balloon changes from L to L by the addition of J energy as heat. Assume that all the heat comes from the combustion of propane. What mass of propane must be burned to furnish this amount of energy assuming the heat transfer process is 50.% efficient?

5162.539 g

Explanation:

Let assume that the volume changes from to .

And if the addition of energy as heat is

Then; we can say that the total heat that is taken by the ballon =

The total heat supplied = total heat coming from the combustion of propane

∴

If 2221 kJ is produced as a result of the combustion of 44.1 g

Then;

will produce

= 5162.539 g

Thus, the mass of the propane that must be burned = 5162.539 g

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them