1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Helga [31]
3 years ago
11

Cindy made tea. She started with 300 grams of water at 20 degrees Celsius. She transferred 18,000 calories to the water. What wa

s the final temperature of the water?
Chemistry
1 answer:
Serjik [45]3 years ago
8 0

Answer:

T final = 80°C

Explanation:

  • Q = mCpΔT

∴ Q = 18000 cal

∴ m H2O = 300 g

∴ Cp H2O (15°C) = 0.99795 cal/g.K ≅ 1 cal/g.K

∴ T1 = 20°C = 293 K

∴ T2 = ?

⇒ 18000 cal = (300 g)(1 cal/g.K)(T2 - 293 K)

⇒ (18000 cal)/(300 cal/K) = T2 - 293 K

⇒ T2 = 293 K + 60 K

⇒ T2 = 353 K (80°C)

You might be interested in
Which of the following is a strong base?
AysviL [449]
D. Sodium hydroxide aka naOH
3 0
3 years ago
Read 2 more answers
What material causes a wave to bounce off of it
Harrizon [31]
Its a Reflector

Reflector is some sort of material that is used to collect or bounce off energy such as sound, light, or radio wave

Usually it took form in some sort of parabolic that revolve around an axis
8 0
3 years ago
Read 2 more answers
If 448.85 mg of KOH is dissolved in 400 ml of water, what will be the pH of the solution?
emmasim [6.3K]
I have provided the steps and solution within the attachment. The pH of the solution would be 12.30, this indicates that the solution is basic, as a higher value of pH indicates presence of more hydroxide ions and less of hydrogen ions in the solution.

8 0
3 years ago
In what month does winter begin in the southern hemisphere
Katyanochek1 [597]

In the Southern Hemisphere this would be around June 20 and culminates on September 22.

7 0
3 years ago
Read 2 more answers
Cal is titrating 50.8 mL of 0.319 M HBr with 0.337 M Ba(OH)2. How many mL of Ba(OH)2 does Cal need to add to reach the equivalen
alexgriva [62]

Answer:

V_{base}=24.04mL

Explanation:

Hello!

In this case, according to the chemical reaction by which HBr reacts with Ba(OH)2:

2HBr+Ba(OH)_2\rightarrow BaBr_2+2H_2O

We can see there is a 2:1 mole ratio between the acid and the base; thus, at the equivalent point we can write:

2M_{base}V_{base}=M_{acid}V_{acid}

Therefore, for is to compute the volume of the used base, we proceed as shown below:

V_{base}=\frac{M_{acid}V_{acid}}{2M_{base}}

And we plug in to obtain:

V_{base}=\frac{0.319M*50.8mL}{2*0.337M}\\\\V_{base}=24.04mL

Best regards!

8 0
3 years ago
Other questions:
  • what is the volume occupied by 0.118 mol of helium gas at a pressure of 1.05 atm and a temperature of 322 K?
    12·1 answer
  • If earth did not rotate what would happen to the hlobal wind
    6·1 answer
  • What happens when the electron moves from the first energy level to the second energy level?
    9·2 answers
  • What is the chemical formula of iron (II) sulfide would be: (EO S = +2 and EO Fe = +2). please
    12·1 answer
  • Human skin color varies widely around the world, and children do not always exhibit the exact same coloring as their parents. Ba
    14·1 answer
  • A particular air sample at 1 atm pressure has a density of ~ 1.3 g/L and contains SO2 at a concentration of 25 ug/m3. What is th
    12·1 answer
  • The CNO cycle produces energy in which of the following?
    8·1 answer
  • Which statement correctly describes measuring with a graduated cylinder?​
    9·1 answer
  • Hydrogen iodide can decompose into hydrogen and iodine gases. 2HI(g) H2(g) I2(g) K for the reaction is 0.016. Of 0.148 atm of HI
    14·1 answer
  • A log burns to ashes in a fireplace what kind of change is this​
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!