Why hello there!
The correct answer to your question is C because exothermic energy is based of on using heat and heat acts like the activation !
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Answer: can u explain ur question please?
Explanation:
Answer:
One may conclude that they have an identical number of electrons in their outermost shell, therefore the can be substituted for one another.
Explanation:
Elements in the same family tend to behave similarly in chemical reactions because they have similar number of valence electrons in their outermost shell and they also have similar chemical properties.
Valence electrons are responsible for reactions between elements. The valence electron makes it possible for atoms to combine and react, therefore, elements in a family behave similarly in chemical reactions because they have an identical number of electrons in their outermost shell.
Answer:
The final temperature of the solution is 46.93°C
Explanation:
we have to calculate the heat produced.
where,
= enthalpy change = 81.5 kJ/mol
q = heat released = ?
m = mass of CaCl_2 = 15.0 g
Molar mass of CaCl_2 = 110.98 g/mol
Now put all the given values in the above formula, we get:
calculate the final temperature of solution in the calorimeter.
where,
q = heat produced = 11.0 kJ = 11000 J
m = mass of solution = 15.0 + 105 = 120.0 g
c = specific heat capacity of water = 4.18J/g°C
= initial temperature = 25.0°C
= final temperature = ?
Now put all the given values in the above formula, we get:
The final temperature of the solution is 46.93°C