(B) specific gravity
(C) vapor pressure
(D) viscosity
(E) freezing point
B. work produces disorder in a system.
C. work produces waste heat, which leaves a system.
D. all of the above
(3) the change in solubility of the reacting substances
(4) the energy released or absorbed during the reaction
Answer: (4) the energy released or absorbed during the reaction
Explanation: Potential energy diagram is the representation of energy with the course of reaction. It shows the energy of reactants, activation energy which is the energy required by the reactants to cross the energy barrier and the energy of the products.
Thus the difference of energy of products and energy of reactants gives us the energy released or absorbed during the reaction.
where = enthalpy of reaction
= energy of products
= energy of reactants
If > , energy is absorbed and reaction is endothermic
< , energy is released and the reaction is exothermic.
b. increasing the pressure of the solution
c. decreasing the size of the salt particles
d. increasing the temperature of the solution
The following which would not affect the rate of dissolution of salt in a beaker of water is:
The dissolution of salt in a beaker of water increases when an external force stirs it which makes it move from its initial position to a new position.
As a result of this, we can see that if there is a decrease in the size of salt in the beaker of water, there would also be a change in the dissolution of salt in the water.
However, increasing the pressure of the solution would not affect the rate of dissolution of salt in the beaker of water.
Therefore, the correct answer is option B
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Answer: Option (b) is the correct answer.
Explanation:
When we stir a solution then its particles start to move from their initial position leading to more number of collisions between them.
As a result, rate of dissolution increases with stirring.
When we increase the pressure then no change in dissolution occurs because in liquids and solids pressure does not play any role is solubility or dissolution.
When we decrease the size of solute particles then there occurs an increase in surface area of solute. Hence, due to this more number of solute particles are able to come in contact with the solvent.
This will lead to more number of collisions. Therefore, rate of dissolution will increase.
Also, when we increase the temperature then molecules of solution will gain kinetic energy leading to more number of collisions which will eventually lead to increase in rate of dissolution.
Thus, we can conclude that out of the given options increasing the pressure of the solution would not affect the rate of dissolution of salt in a beaker of water.
the ideal gas law equation is as follows
PV = nRT
where P - pressure
V - volume
n - number of moles
R - universal gas constant
T - temperature
so if the pressure, volume and temperature are already known
we are left with n and R
since R is the universal gas constant that has a known fixed value then R too is known
so we are left with 'n'
once we know temperature volume and pressure
we can find the number of moles of gas present using the ideal gas law equation
A.) the molar amount of gas
Hope it helps!