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natta225 [31]
3 years ago
7

23 Which term is defined as the difference between the potential energy of the products and the potential energy of the reactant

s in a chemical reaction?(1) activation energy (3) heat of fusion
(2) thermal energy (4) heat of reaction
Chemistry
2 answers:
UkoKoshka [18]3 years ago
7 0
The answer is 4) heat of reaction.
Svetllana [295]3 years ago
4 0

Answer: (4) heat of reaction

Explanation:

1) Activation energy is defined as the extra energy required by the reactants to cross the energy barrier in order to get converted to products.

2) Heat of fusion is the the heat required to convert 1 mole of the solid into liquid state at constant pressure.

3) Thermal energy is the energy possessed by an object by virtue of its temperature.

4) Heat of reaction is defined as the difference between the potential energy of the products and the potential energy of the reactants in a chemical reaction.

\Delta H=E_p-E_R

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WILL MARK B!
melisa1 [442]

Answer:

Bro don't cheat in online exams bro

3 0
3 years ago
A 50.0-ml sample of 0.200 m sodium hydroxide is titrated with 0.200 m nitric acid. calculate the ph in the titration after you a
attashe74 [19]

Hey there!:

Concentration of NaOH = 0.200 M

Concentration of HNO₃= 0.200 M

Total volume =  50.0 mL + 60.0 mL = 110 mL=> 0.11 L

The neutralization reaction between  NaOH and HNO3 :

OH⁻  + H⁺  ---------->  H₂O

So :

n ( H⁺ ) = 60 mL * 0.200 M / 1000 mL  => 0.012 moles of H⁺

n ( OH⁻ ) = 50 mL 0.200 M / 1000 mL => 0.01 moles of OH⁻

Hence OH⁻ is limiting reagent  .

Remaining moles of  H⁺ = 0.012 - 0.01  =>  0.002 moles

Concentration of H⁺  = 0.002 M / 0.11 L

Concentration of H⁺ = 0.01818 moles/L

Therefore:

pH = - log [ H⁺ ]

pH = - log [ 0.01818 ]

pH = 1.74

Hope that helps!

7 0
3 years ago
A student decides to dissolve crackers in their soup as fast as possible. After increasing the surface area of the crackers, the
Margarita [4]

Answer:

They can let the cracker sit in the soup for a few minutes

3 0
3 years ago
a 3.50L sample of neon gas has a pressure of .950atm at 20c what would the volume be if the pressure increased to 1.50atm and th
ehidna [41]

Answer:

V_2=2.22L

Explanation:

Hello,

In this case, we use the Boyle's law which allows us to understand the volume-pressure behavior as an inversely proportional relationship:

P_1V_1=P_2V_2

Thus, solving for the final volume, once the pressure changes, we obtain:

V_2=\frac{P_1V_1}{P_2}=\frac{3.50L*0.950atm}{1.50atm}  \\\\V_2=2.22L

Best regards.

8 0
4 years ago
2NO + 2H2 ⟶N2 + 2H2O What would the rate law be if the mechanism for this reaction were: 2NO + H2 ⟶N2 + H2O2 (slow) H2O2 + H2 ⟶2
Talja [164]

Answer:

rate = [NO]²[H₂]

Explanation:

2NO + H2 ⟶N2 + H2O2 (slow)

H2O2 + H2 ⟶2H2O (fast)

From the question, we are given two equations.

In chemical kinetics; that is the study of rate reactions and changes in concentration. The rate law is obtained from the slowest reaction.

This means that our focus would be on the slow reaction. Generally the rate law is obtained from the concentrations of reactants in a reaction.

This means our rate law is;

rate = [NO]²[H₂]

6 0
3 years ago
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