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
MArishka [77]
2 years ago
12

Given 16.2 grams of substance Y, if the substance absorbs 2722 joules of energy and the specific heat of the substance is 9.22 J

/g·°C, what is the final temperature of the substance if the initial was 26 degrees Celsius?
Chemistry
1 answer:
snow_tiger [21]2 years ago
4 0
Since the substance absorbs heat, it is expected that the temperature will rise. The formula for the internal energy of a substance is given by the equation:

ΔU = mCpΔT

where:

ΔU = internal energy
m = mass of substance
Cp = specific heat capacity of substance
ΔT = change in temperature

ΔU = 2722 Joules = 16.2 grams (9.22 J/g-°C) (Tf - 26°C)

This gives a final temperature of Tf = 44.22 °C
You might be interested in
The chemical energy created is stored as ___________________ or __________________.
svp [43]

Chemical energy is kept inside the bonds that are connected to withatoms with other atoms and molecules with other molecules.

Because chemical energy is kept in likestorage. It is an shape of potential energy.

When a  chemical reaction takes place, the stored chemical energy is let out.

5 0
3 years ago
According to the equation for the kinetic energy of a moving object, which gas would have the lowest average velocity, assuming
Illusion [34]

Answer:

O3

Explanation:

3 0
3 years ago
45. Which electron configuration represents an
uysha [10]

Answer:

The correct answer is - (4) 1s2 2s2 2p5 3s2

Explanation:

An excited state is a state when the valence electron has moved to some other higher energy orbital, from its ground state orbital. The ground state has a lower energy level or sublevel. In this case, the higher energy level orbit fills before the lower energy level.

In option 4, the last electron is filled in higher energy orbit 3s2 before filling the lower or ground energy level 2p5, in the ground state it would be 1s2 2s2 2p6 3s1 instead of 1s2 2s2 2p5 3s2.

Thus, the correct answer is option 4.

3 0
3 years ago
C. What happens to stuff when you add heat energy to it?
Minchanka [31]

Answer:

it warms up

Explanation:

8 0
2 years ago
Read 2 more answers
Strotium−90, a radioactive isotope, is a major product of an atomic bomb explosion. It has a half-life of 28.1 yr. (a) Calculate
Bess [88]

Answer :

(a) The first-order rate constant for the nuclear decay is, 0.0247\text{ years}^{-1}

(b) The fraction of 90-Sr that remains after 10 half-lives is, \frac{a_o}{1024}

(c) The time passed in years is, 127.4 years.

Explanation :

<u>Part (a) :</u>

Half-life = 28.1 years

First we have to calculate the rate constant, we use the formula :

k=\frac{0.693}{t_{1/2}}

k=\frac{0.693}{28.1\text{ years}}

k=0.0247\text{ years}^{-1}

Thus, the first-order rate constant for the nuclear decay is, 0.0247\text{ years}^{-1}

<u>Part (b) :</u>

Now we have to calculate the fraction of 90-Sr that remains after 10 half-lives.

Formula used :

a=\frac{a_o}{2^n}

where,

a = amount of reactant left after n-half lives

a_o = Initial amount of the reactant

n = number of half lives  = 10

Now put all the given values in the above formula, we get:

a=\frac{a_o}{2^{10}}

a=\frac{a_o}{1024}

Thus, the fraction of 90-Sr that remains after 10 half-lives is, \frac{a_o}{1024}

<u>Part (c) :</u>

Now we have to calculate the time passed.

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant  = 0.0247\text{ years}^{-1}

t = time passed by the sample  = ?

a = let initial amount of the reactant  = 100

a - x = amount left after decay process = 100 - 95.7 = 4.3

Now put all the given values in above equation, we get

t=\frac{2.303}{0.0247}\log\frac{100}{4.3}

t=127.4\text{ years}

Therefore, the time passed in years is, 127.4 years.

6 0
3 years ago
Other questions:
  • What is a common property of metals?
    6·1 answer
  • According to the graph, which statement is true?
    10·1 answer
  • can you help me with #7? #7 says "A substance enters into and is altered through the course of a chemical change. it is called a
    15·2 answers
  • How many liters of chlorine gas can react with 56.0 grams of calcium metal at standard temperature and pressure? Show all of the
    11·2 answers
  • What is the mass of 8.90 moles of magnesium chloride, MgCl2?
    9·1 answer
  • According to your textbook, how many of the following are properties of covalent compounds:
    14·1 answer
  • Review the PCR (Calvin-Benson-Basham) cycle and the photochemical (light) reactions. If photosynthesizing green algae are provid
    10·1 answer
  • Why is there no gas pressure in a vacuum?
    14·1 answer
  • Give an example of a base in chemistry
    5·2 answers
  • Sodium electron configuration
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!