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
eimsori [14]
3 years ago
8

Which phase change is exothermic?

Chemistry
1 answer:
DerKrebs [107]3 years ago
8 0
Freezing, condensation, Deposition.
You might be interested in
the trend for ionization energy is a general increase from left to right across a period. However phosphorus is found to have hi
dimaraw [331]
Since phosphorus is in the 5th group it has the ability to gain or lose electrons
4 0
3 years ago
1.What is the specific heat capacity of granite when 20 kg absorbs 237 000 J of heat energy, causing its temperature to increase
Natalka [10]

<u>Given</u> :

  • Amount = 20 kg
  • Heat energy absorbed = 237,000 J
  • Temperature change = 15 °C

<u>Formula applied</u> :

\boxed {Q = mc \triangle T}

  • Q = absorbed heat
  • m = mass
  • c = specific heat capacity
  • ΔT = temperature change

Let's solve for c !

⇒ 237,000 = 20 × c × 15

⇒ c = 237,000 ÷ 300

⇒ \boxed {c = 790 J kg^{-1} K^{-1}}

∴ The specific heat capacity of granite is <u>790 J kg⁻¹ K⁻¹</u>.

5 0
1 year ago
What type of element has 8 electrons in their outer most level?
RideAnS [48]

Answer:

Noble gases

Explanation:

Neon and argon have 8 electrons in their outermost shells. The elements which have 8 electrons in the outermost shell or in the valence shell,are known as the noble gases.

6 0
3 years ago
Read 2 more answers
What process describes how plants use air, water, and energy from the Sun to make their own food? A) water.
CaHeK987 [17]

D) the products of photosynthesis.

8 0
3 years ago
Read 2 more answers
When a solution of sodium hydroxide is mixed with iron (II) chloride, a green precipitate is formed. What is the balanced equati
marshall27 [118]

The balanced chemical equation for the reaction is:

2NaOH(aq) + FeCl₂(aq) --> 2NaCl(aq) + Fe(OH)₂(s)

<h3>What is a chemical equation? </h3>

Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.

The reactants are located on the left side while the products are located on the right side.

Reactants —> Products

The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.

<h3>How to write the balanced equation </h3>

Sodium hydroxide => NaOH

Iron (II) chloride => FeCl₂

2NaOH(aq) + FeCl₂(aq) --> 2NaCl(aq) + Fe(OH)₂(s)

Learn more about chemical equation:

brainly.com/question/7181548

#SPJ1

5 0
2 years ago
Other questions:
  • What two main characteristics are used to classify air masses
    5·1 answer
  • The equilibrium constant for the reaction of carbon monoxide with water is 1.845. if 1.00 mol of each reactant is placed in a 2.
    8·1 answer
  • A certain radioisotope has a half-life of 7.32 days. what percentage of an initial sample of this isotope remains after 36 days?
    12·1 answer
  • To reflect about a problem means to ask yourself about any possible ‘what ifs.’ Please select the best answer from the choices p
    12·2 answers
  • A 25.0 mL sample of 0.105 M HCl was titrated to the equivalence point with 31.5 mL of NaOH. What is the concentration of the NaO
    5·1 answer
  • Which of the following has the greatest force between particles? Why?
    6·2 answers
  • At sea level, where the pressure was 104 kPa and temperature 21.1 ºC, a certain mass of air occupies 2.0 m3 . To what volume wil
    10·1 answer
  • What is an example of reactivity?
    15·1 answer
  • At what temperature does a gas at 1.00 atm and 20 degree Celsius have a pressure of 4.00 atm.
    6·1 answer
  • The energy of the ground state in the bohr model is -13. 6 ev. the energy of the n = 2 is:_______
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!