1. Consider the following: HCl (aq) + NaOH (aq) → NaCl (aq) + H2O (liq) ∆H = -57.62 kJ/mol
If a 25.0 mL of 0.144 M HCl (aq) at 25oC is added to 20.0 mL of 0.132 M NaOH (aq) at 25oC, calculate the final temperature of the contents. Assume the volumes are additive and that the resulting salt water solution has a density of 1.04 g/mL with a specific heat capacity of 3.93 J/goC. Note that you will also need to determine the limiting reactant.

Answers

Answer 1

Answer:

25.82°C

Explanation:

Based on the reaction, 1 mole of HCl and 1 mole of NaOH reacts, that means the reaction is 1:1. The moles of each compound are:

Moles HCl:

0.025L * (0.144mol/L) = 0.0036 moles HCl

Moles NaOH:

0.020L * (0.132mol/L) = 0.00264 moles NaOH

Thus, moles of reaction are 0.00264 moles

The heat released in a calorimeter is obtained using the equation:

Q = m*c*ΔT

Where Q is heat released in the reaction:

0.00264 moles * (-57.62kJ/mol) = 0.1521kJ = 152.1J of reaction

m is mass of the solution:

25.0mL + 20.0mL = 45mL * (1.04g/mL) = 46.8g

c is specific heat of the solution:

3.93J/gºC

And ΔT is change in temperature.

Solving for ΔT:

Q /mc = ΔT

151.2J / 46.8g*3.93J°C = 0.82°C = ΔT = Final temperature - Initial temperature.

Final temperature = 0.82°C + 25°C =

25.82°C


Related Questions

How would you calculate an object's mechanical energy?
a. Add its kinetic and potential energies. b. Multiply its kinetic and potential energies.
c. Subtract its kinetic energy from its kinetic energy.
d. Subtract its potential energy from its kinetic energy.​

Answers

Answer:

You would add its kinetic and potential energies.

Explanation:

Hope this helps!! :)

Answer:

A) Add its kinetic and potential energies

Explanation:

I got it right on Edge 2022

Is a diamond a homogeneous or heterogeneous mixture?

Answers

Answer:

It's a heterogeneous mixture.

Explanation:

Diamond is made of just one element: carbon. Each carbon atom in diamond is connected to four other carbon atoms, in a crystal that extends on and on. There are other forms of pure carbon where the atoms are bonded differently, notably charcoal and graphite.

Answer:

It's a heterogeneous mixture.

Explanation:

Diamond is made of just one element: carbon.

Other Questions
what is the type of each sentence ? 13. A nuclear decay chain representsthe reason why only fission is more efficient than fusion for nuclear energya series ofdecays producing sequentially more stable nucleib. the only possible type of decay that an isotope can undergo d. the process of nuclei becomingincreasingly energetic as they release radiation It isnt an adult but a child who helps Madame see Truth. Why is this point important? PLEASE help due today If you walk at 0.75 m/s, how far will you be in 2 hours? (hint change hours intoseconds) *3.5 meters75 meter150 meters5400 meters Lines A and CD (if shown) are straight lines. Find x. Give reasons to justify your solutions.Please Write in a form like the table below. PLEASE HELP!!A person is traveling at 5m/s for around 20 minutes. how much distance did he cover? hint: change minutes to seconds. Someone give me some new artists/people to listen to Whats the value of y in this picture L.B. Johnson Middle School held a track and field event during the school year. The chess club sold various drink and snack items for the participants and the audience. All together, they sold items 486that totaled .$2,673a.If the chess club sold each item for the same price, calculate the price of each item. Information on Plasma Membrane (first answer gets a brainliest!) The graph shows the number of hours that Tammy spends typing for work, x, and the amount of pay that she earns, y.A graph titled Tammy's Pay with number of hours on the x-axis and pay in dollars on the y-axis. A line goes through points (2, 18) and (8, 42).What does the y-intercept represent? Store purchases boxes of pasta for $0.82 in cans of sauce for $1.62 how much profit does the store make from this purchase? What enzyme catalyzes the reaction in the Calvin cycle? Two cars start at the same point and travel in opposite directions. The first car travels 15 miles per hour faster than the second car. In 4 hours, the cars are 300 miles apart. Use the formula below to determine the rate of the second car. 4(r + 15) + 4r = 300 What is the rate, r, of the second car? Solve for r. Unit 1 TestHow did the Boston Massacre contribute to the writing of the Declaration of Independence?o Many colonists began to see the British government as a source of protection.o Many colonists began to fear the British government's harsh actions toward the colonies.o Many colonists began to oppose the British government's building of forts on the frontier.O Many colonists began to see the British government as a supporter of free speech. anyone live in park slope brooklyn What is the line's slope? The chart shows the number of blue crabs, a commonly-eaten seafood, in a population sample in South Carolina. Using the phrase "in tow" means that this shows the number of crabs caught in nets per year. The information in the chart suggests that blue crabs are likely A) becoming extinct. B) being overfished. C) now in abundance after years of struggling. D) decreasing in number, but increasing in size. Poor Leo the Lion, worried he would never escape the hunters net! Then, who did he see scampering through the jungle? The same mouse he had released from his trap just a few days before. When the mouse saw his friend, the lion, he quickly nibbled through the knotted net and set him free. "You rescued me, the mouse said. "Now its my turn to set you free!Which theme can be found in this excerpt?Watch out for hunters nets in the jungle.Little mice have extremely sharp teeth.When we help others, we help ourselves.Dont be afraid, even when you are all alone.