Answer:
The heat capacity of the bomb calorimeter is 7.58 J/°C.
Explanation:
First, we will calculate energy released on combustion:
= enthalpy change = -3267.5 kJ/mol
q = heat energy released
n = number of moles benzene=
q = -90.0657 kJ = -90,065.7 J
Now we calculate the heat gained by the calorimeter let it be Q.
Q = -q= -(-90,065.7 J) = 90,065.7 J (conservation of energy)
where,
Q = heat gained by calorimeter
c = specific heat capacity of calorimeter =?
= final temperature =
= initial temperature =
Now put all the given values in the above formula, we get:
The heat capacity of the bomb calorimeter is 7.58 J/°C.
In physical chemistry and thermodynamics, the Gibbs free energy or ΔG is very important because it is the criterion for spontaneity. When the magnitude of ΔG is negative, the reaction is spontaneous. This means that the reaction readily occurs. When the magnitude is positive, the reaction is non-spontaneous. This means that in order for the reaction to proceed, you must apply external force like electricity.
For equilibrium reactions, there is a forward and reverse reaction written as: A+ B ⇆ C. Only one of those reactions is spontaneous. So, if the forward reaction is -ΔG, then the reverse reaction is the opposite which is +ΔG. The answer is letter A.
Answer:
True
Explanation:
The complete question is:
<u><em>"A reaction contains two reactants, A and B. If A is doubled, there will be a greater number of effective collisions between reactants. TRUE FALSE"</em></u>
Collision Theory indicates that chemical reactions take place because molecules, atoms or ions collide with each other.
Furthermore, the molecules must collide effectively, that is, not all reagent collisions lead to product formation. Effective shock means that the reagent molecules have enough kinetic energy at the time of the shock for their bonds to break and product bonds to form. In addition, the molecules of the reagents must be properly oriented for the reaction to take place.
As the concentration increases, the number of shocks increases. In other words, by increasing the concentration of the reactants, the probability of collision between their molecules increases, and therefore the number of effective collisions.So the statement is true-
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