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zhenek [66]
3 years ago
13

I need help with this problem

Chemistry
1 answer:
Licemer1 [7]3 years ago
4 0

WELL 5 PLUS 3 IS FIVE U ARE WELOCOME

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Consider the following specific heats of metals. Metal Specific Heat Aluminum 0.897 J/(g°C) Magnesium 1.02 J/(g°C) Lithium 3.58
Arte-miy333 [17]

Answer:

Lithium

Explanation:

The specific geat capacity of a substance is the energy required to raise 1 unit of that substance by one degree.

Heat energy (Q) = mc∇t

Q = heat energy

M = mass of the substance

c = specific heat capacity

∇t = change in temperature of the substance

Generally, increase in the specific heat capacity will lead to a lower final temperature likewise decrease in the specific heat capacity will lead to increase the final temperature of the substance.

From the data above, we can take just two specific heat capacity and test this theory.

Assuming we have a

Mass = 25g

Heat energy applied (Q) = 1 J

Initial temperature (T1) = 10°C

Final temperature (T2) = ?

Q = mc∇t

Q = mc (T2 - T1)

For Lithium, specific heat capacity = 3.58J/g°C

1 = 25 × 3.58 (T2 - 10)

Solve for T2

1 = 89.5 (T2 - 10)

1 = 89.5T2 - 895

89.5T2 = 896

T2 = 896 / 89.5

T2 = 10.011°C

For Magnesium (Mg) specific heat capacity = 1.02J/g°C

Q = mc∇t

1 = 25 × 1.02 × (T2 - 10)

1 = 25.5 (T2 - 10)

1 = 25.5T2 - 255

Solve for T2

25.5T2 = 256

T2 = 10.039°C

Notice the trend that decrease in the specific heat capacity leads to increase in the final temperature.

Try and continue for the elements and see how it works.

4 0
3 years ago
I need help please, will give you 5 stars
Mashcka [7]

Answer:

The correct answer to this question would be D, A single replacement reaction takes place because sodium is more reactive than hydrogen.

Explanation:

I hope this helps you:)

8 0
3 years ago
Read 2 more answers
_C + _H2 + _02 → _C2H6O<br> Balance equation
morpeh [17]

Balance : C + H₂ + O₂ ----> C₂H₆O

Explanation:

Chemical reaction

When two or more substances react and form some new substance it is called as chemical reaction .

For example :

C + H₂ + O₂ ----> C₂H₆O

Chemical equation : it is the representation of chemical reaction in terms of symbols ,molecular formulas ,moles , states  etc .

As we know all chemical reaction obeys law of chemical combination therefore chemical reaction need to be balanced .  

Balance : C + H₂ + O₂ ----> C₂H₆O

2C + H₂ + O₂ ----> C₂H₆O

7 0
3 years ago
Read 2 more answers
Need help too please I would really appreciate it
Aleksandr-060686 [28]

Answer:

it's O2 since the oxygen has 6 valence electrons and it can make 2 covalent bonds

7 0
3 years ago
If there is a higher concentration of sodium on the left side of a beaker and the membrane is permeable to the sodium, which of
Irina-Kira [14]

Answer:

sodium is going to migrate the left to the right side through the membrane

Explanation:

Differences in concentration of sodium produce a movement of sodium through the membrane until reach the equilibrium

4 0
3 years ago
Read 2 more answers
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