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natulia [17]
3 years ago
5

How is Hess's law used to measure enthalpy of a desired reaction?

Chemistry
1 answer:
Morgarella [4.7K]3 years ago
6 0

Answer:

D

Explanation:

I hope this is correct

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A student attempts to measure the specific heat capacity of an unknown liquid through repeated trials. She measures its specific
Goryan [66]

Answer:

2.13

Explanation:

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3 years ago
Explain the reaction between metallic hydroxides and a dilute acid?
dolphi86 [110]
The hydroxide (OH) in the metallic hydroxide will react with the hydrogen in an acid to form H2O. The remaining ions will combine to form a salt. Therefore a metal hydroxide and an acid will form a salt + water.
7 0
3 years ago
How to work out the rate of reaction in Chemistry
Arlecino [84]
One way you can work out the rate of reaction is by the amount of product that is produced to time. This can also be done with heat and time.

Hope this helps! :)
8 0
3 years ago
The rate constant k for a certain reaction is measured at two different temperatures:
bogdanovich [222]

Answer:

Ea=5.5 Kcal/mole

Explanation:

Let rate constant are K_1  and K_2  at temperature T_1  and T_2

By using Arrhenius equation at two different two different temperature,

Log K_1/K_2 =E_a/2.303R*(1/T_2 -1/T_2 );T_1=273+376=649K  ;K_1=4.8*10^8;T_2=273+280=553K  ;K_2=2.3*10^8;R=2 cal/(mole.K);Log (4.8*10^8)/(2.3*10^8 )=E_a/2.303R*(1/553K-1/649); Log 4.8/2.3=E_a/2.303R*96/358897 ;0.32=E_a/2.303R*96/358897;E_a=(0.32*2.303R*358897)/96;  

By putting value of R=2 cal/mole.K

E_a=5510.265cal/mole;

By rounding off upto 2 significant figure;

E_a=5.5Kcal/mole;

8 0
3 years ago
The graph of several pressure-volume readings on a contained gas at constant temperature would be
tigry1 [53]

Answser: a curved line.


Justification:


Boyle's law states that a constant temperature the volume of a certain amount of gas is inversely related to the pressure:<em> pV = k.</em>


The graph of two inverseley related variables is a curve: as one variable increases the other decresases.


In such a curve for any pair of points it is obeyed Boyle's law: pV = constant, so:

<em>         p₁V₁ = p₂V₂ = p₃V₃ = ... = k</em>


Mathematically, the graph represents a hyperbola: as the value of one of the variables increase the other trends to zero, so the curve approaches the axis without touching them.


See the figure attached to visualize the form of the curve.

8 0
3 years ago
Read 2 more answers
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