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LiRa [457]
2 years ago
5

Why do we need to study thermodynamics?

Chemistry
1 answer:
Sever21 [200]2 years ago
6 0
Knowledge of thermodynamics is required to design any device involving the interchange between heat and work, or the conversion of material to produce heat (combustion). Examples of practical thermodynamic devices: What is thermodynamics? The study of the relationship between work, heat, and energy
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Use the electron-transfer method to balance this equation:
Klio2033 [76]

Answer:

The answer to your question is the letter d.

Explanation:

Data

                Zn  +  HCl   ⇒  ZnCl₂  +  H₂

- Calculate the Oxidation number of reactants and products

              Zn⁰  +  H⁺¹Cl⁻¹   ⇒  Zn⁺²Cl₂⁻¹  +  H₂⁰

- Determine which elements changed their oxidation numbers

                      Zn⁰     ⇒   Zn⁺²                Zn lost 2e⁻

                     2H⁺¹      ⇒   H₂⁰                H won 2 e⁻

-Interchange the electrons lost and won

                  2( Zn⁰     ⇒   Zn⁺²)

                  2(2H⁺¹      ⇒   H₂⁰)

-Simplify

                  2Zn⁰     ⇒   2Zn⁺²

                  4H⁺¹      ⇒   2H₂⁰

-Substitute the coefficient in the equation

                2Zn  +  4HCl   ⇒  2ZnCl₂  +  2H₂  

             Reactant       Element      Product

                  2                    Zn                2

                  4                     H                 4

                  4                     Cl                 4

- Now the reaction is balanced

6 0
3 years ago
Calculate the molar mass for citric acid
jeyben [28]

Answer:

C₆H₈O₇ = 192 g/mol

Explanation:

Molar mass is the sum of the atomic weight of the atoms present in compound.

Formula of citric acid:

C₆H₈O₇

Atomic weight of hydrogen = 1 amu

Atomic weight of carbon = 12 amu

Atomic weight of oxygen = 16 amu

C₆ = 6 × 12 = 72 g/mol

H₈ = 8 × 1 = 8 g/mol

O₇ = 7 × 16 = 112 g/mol

C₆H₈O₇ = 72 g/mol +  8 g/mol + 112 g/mol

C₆H₈O₇ = 192 g/mol

7 0
3 years ago
Solve for ‘x’: 12(x-7)+3(2x+2)=50x-2
Alex Ar [27]

Answer:

Explanation:

Hi there!

12(x-7) = 12x -84

3(2x+2) = 6x+6

Total 18x-78

18x-78 = 50x-2

-78= 32x-2

-76= 32x

19/8 =x

Hope you understand

Have a nice day,

Wolfiex.

5 0
4 years ago
2.17 in to 10^23 molecules of Br 2 to moles
KiRa [710]

I don't get what you are saying... Can you reword it?

3 0
3 years ago
HELP RTIGHT NOWWWWWWWWWWWWWWWWW
Alexus [3.1K]

Explanation:

biosphere

that is the answer

7 0
3 years ago
Read 2 more answers
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