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
Kitty [74]
2 years ago
13

How many kilojoules are needed to convert 77.5 grams of ice at -8.00°C to water at 95.0°C?

Chemistry
1 answer:
Over [174]2 years ago
7 0
Q=mcθ
m= 0.0775 kg
c= 4184 J·kg−1·K−1.
θ= T(final) - T(initial), 95-(-8)

Q=33398.78 J so kJ divide 1000

= 33.39878 kJ
You might be interested in
Ammonia will decompose into nitrogen and hydrogen at high temperature. An industrial chemist studying this reaction fills a flas
valentina_108 [34]

Answer:

Kp = 0.022

Explanation:

<em>Full question: ...With 2.3 atm of ammonia gas at 32. °C. He then raises the temperature, and when the mixture has come to equilibrium measures the partial pressure of hydrogen gas to be 0.69 atm. </em>

<em />

The equilibrium of ammonia occurs as follows:

2NH₃(g) ⇄ N₂(g) + 3H₂(g)

Where Kp is defined as:

Kp = \frac{P_{N_2}P_{H_2}^3}{P_{NH_3}^2}

<em>Where P represents partial pressure of each gas.</em>

<em />

As initial pressure of ammonia is 2.3atm, its equilibrium concentration will be:

P(NH₃) = 2.3atm - 2X

<em>Where X represents reaction coordinate</em>

<em />

Thus, pressure of hydrogen and nitrogen is:

P(N₂) = X

P(H₂) = 3X.

As partial pressure of hydrogen is 0.69atm:

3X = 0.69

X = 0.23atm:

P(NH₃) = 2.3atm - 2(0.23atm) = 1.84atm

P(N₂) = 0.23atm

P(H₂) = 0.69atm

Kp = \frac{0.23atm*0.69atm^3}{1.84atm^2}

<h3>Kp = 0.022</h3>
8 0
3 years ago
The most common cooling mechanism for cloud formation is ________.
KatRina [158]
The answer is "Rising and expanding air or atmosphere cooling".
To form a cloud the air must be cooled to the temperature of dew point. when there is expansion of air, it cools to the dew point and thus the formation of cloud happens. This process is very common and used for the formation of clouds.
8 0
3 years ago
LOOK AT THE PICTURE!! i’ll mark as brainliest!!
Lera25 [3.4K]

Answer:

c

Explanation:

8 0
3 years ago
Read 2 more answers
Please help 21 points
Novosadov [1.4K]

Answer:

You

Explanation:

Will have to fill in the graph organizer with a story

4 0
3 years ago
Which of the following is an example of a situation where work occurs?
SIZIF [17.4K]

Answer:

D is the answer may be. I'm not sure.

4 0
2 years ago
Other questions:
  • A 250-ml sample of na2so4 is reacted with an excess of bacl2. if 5.28 g baso4 is precipitated, what is the molarity of the na2so
    7·1 answer
  • If you wanted to design an experiment to show that the solubility of sugar in tea varies according to the temperature, what vari
    12·2 answers
  • There state of matter that keeps its shape and volume when it is placed in a container
    13·1 answer
  • How are mixtures and solutions different from each other?
    5·1 answer
  • Plutonium is part of what series of elements?
    10·2 answers
  • Base A dissociates 25% in water. Base B dissociates 50%. Base C dissociates
    7·1 answer
  • 4. A salvage operator recovered coins believed to be gold. A sample weighed 385.000g and has a volume of 20.0mL. Were the coins
    14·1 answer
  • IF UR GOOD AT CHEM PLZ ANSWER MY PREVIOUS QUESTIONS ON MY PROFILE, I NEED HELP!!
    13·1 answer
  • Which of the following correctly describes what happens to the kinetic energy of water when it changes from steam to a
    15·1 answer
  • Which statement best explains why the elements in Group 18 do not have electronegativity values?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!