Concept explainers
A quantity of
Interpretation:
The final temperature of the reaction taking place in constant-pressure calorimeter, when given amount of
Concept introduction:
Heat absorbed or released in the reaction is given by:
Here,
Specific heat is the heat required to increase the temperature of
Heat absorbed or released in the reaction is also given by:
Here,
Heat capacity is defined as the heat required to increase the temperature of a body by1°C.
Its S.I. unit is
Concentration (molarity) of a solution is given by:
Here,
Answer to Problem 115AP
Solution:
Explanation of Solution
Given information:
Molar heat of neutralisation is
Heat capacity
Concentration (molarity) of a solution is given by:
It can be rewritten as
Equation for the ionization of
So, it is clear that
The number of moles of
Substitute
Equation for the ionization of
So, it is clear that
The number of moles of
Substitute
Now, the heat produced by the reaction is calculated by:
Substitute
It is known that
Therefore,
However, the heat of the surroundings includes the heat of water and the heat of the calorimeter. So,
Mass of
Substitute
Substitute
So, the change in temperature iscalculated as
Therefore, the final temperature iscalculated as
The final temperature of the reactiontaking place in constant-pressure calorimeter is
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