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cluponka [151]
2 years ago
15

The heat exchange in chemical reactions is due to change in

Chemistry
2 answers:
oksian1 [2.3K]2 years ago
8 0
The heat exchange in chemical reactions is due to change in enthalpy.
kirza4 [7]2 years ago
5 0
The enthalpy is the heat added to or lost in a system. 
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Which statement about a reaction is not correct?
Vikki [24]

Answer:

D

Explanation:

A reaction that is exothermic and causes a decrease in the entropy of the system cannot be a spontaneous reaction. This is not totally true because naturally For a spontaneous process, the entropy of the universe (system plus surroundings) must increase. This is the 2nd law of thermodynamics. The system entropy can decrease as long as the entropy of the surroundings increases enough to make the sum of the system and surroundings positive.

And we know that a spontaneous reaction is a reaction that occurs in a given set of conditions without intervention. Spontaneous reactions are accompanied by an increase in overall entropy or disorder. If the Gibbs Free Energy is negative, then the reaction is spontaneous, and if it is positive, then it is nonspontaneous.

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3 years ago
Which formula equation represents the burning of sulfur to produce sulfur dioxide?
Ghella [55]

Answer:

O S(s) + O2(9) A, 502(9)

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3 years ago
A gas has a temperature of 273.15 K and a pressure of 101.325 kPa. What can be concluded about the gas? It has reached standard
Mandarinka [93]

Explanation:

A gas has a temperature of 273.15 K and a pressure of 101.325 kPa. It can be concluded that this gas has reached standard temperature and pressure.

Standard temperature is zero degree celcius which corresponds to 273.15 degree kelvin.

Standard pressure is 760 mmHg which corresponds to 101.325 kPa.

6 0
2 years ago
An element belonging to the halogen family would be expected to have a ________ ionization energy and a ________ electron affini
nikklg [1K]
<span>An element belonging to the halogen family would be expected to have a large ionization energy and a large electron affinity.
Flourine, Chlorine, Bromine, Iodine and astatine are the elements that belongs to the halogen family and mostly they have high values of ionization energy. 
The amount of energy released when an electron is added to an atom or molecule to form a negative ion or anion is electron affinity.</span>Chlorine from this family has highest electron affinity.

8 0
3 years ago
An alien civilization has different names and symbols for six elements. Place each element in the correct location in the period
Margarita [4]

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why whould I know that!!??

Explanation:

3 0
2 years ago
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