A constant-volume tank contains a mixture of 120 g of methane $\left(\mathrm{CH}_{4}\right)$ gas and 600 g of $\mathrm{O}_{2}$ at $25^{\circ} \mathrm{C}$ and 200 kPa. The contents of the tank are now ignited, and the methane gas burns completely. If the final temperature is 1200 K. determine (a) the final pressure in the tank and (b) the heat transfer during this process.

What constant can you calculate when you know the volume occupied by one mole of gas at standard temperature and pressure?

What is the total cost of executing n of the stack operations PUSH, POP, and MULTIPOP, assuming that the stack begins with

$$s_0$$

objects and finishes with

$$s_n$$

objects?

Where are the arrays stored during execution? Show the contents of the stack and heap during and after executing displayArray, countLetters, and displayCounts in Listing $7.4$.

A solid being heated stays at a constant temperature until it is completely melted. What happens to the heat energy put into the system during that time?

Antes, Lucas y sus amigos hacian muichas cosas. Despues hicieron otras. Completa las oraciones con los verbos entre parentesis. (Complete the sentences.)

A piston–cylinder device contains 1.2 kg of saturated water vapor at $200^{\circ} \mathrm{C}$. Heat is now transferred to steam, and steam expands reversibly and isothermally to a final pressure of 800 kPa. Determine the heat transferred and the work done during this process.

Use KMT to explain why

a. gases expand to fill the space available.

b. gas pressure is proportional to temperature at constant volume .

Someone claims that the absolute pressure in a liquid of constant density doubles when the depth is doubled. Do you agree? Explain.

A stack of quarters is worth $2.25 . Use the equation$0.25 q=2.25$and the replacement set$\{7,8,9\} .$Find$q,$ the number of quarters in the stack.

Determine the heat transfer and the net entropy change in the previous problem. Use the initial pressure of the carbon dioxide to be $4.56\ \mathrm{MPa}$ before the ethylene is flowing into the tank.

T F The STL stack container’s pop operation does not retrieve the top element of the stack, it just removes it.

Suppose that stack is an object of type stackType and six elements are pushed in an initially empty stack.

• What is the value of stack.top?

The given pattern continues. Find nth term of a sequence suggested by the pattern. 1, $\frac{1}{2}$, 3, $\frac{1}{4}$, 5, $\frac{1}{6}$, 7, $\frac{1}{8}$, ...