When the enthalpy of products is higher than that of reactants, such a reaction is said to be endothermic.
<h3>Enthalpy</h3>
The enthalpy of a system refers to the heat content of the system.
When the enthalpy of reactants is higher than that of products in a reaction, such a reaction is said to be exothermic. On the other hand, if the enthalpy of products is higher than that of the reactants, it is endothermic.
More on the enthalpy of systems can be found here: brainly.com/question/13996238
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2Ag +(aq) + SO4 2-(aq)----->Ag2SO4 (s)
I think it is 3, but I'm not sure
When gas is dissolved in a liquid, more gas dissolves into the liquid. It states that when the pressure of the gas when dissolved in liquid increases, the solubility increases. Thus, the correct option is C.
<h3>What is Pressure?</h3>
Pressure may be defined as the amount of force devoted perpendicular to the surface of an object per unit area. The unit of pressure is Pascal or Pa.
The solubility of any solution is directly proportional to the pressure that is exerted on it at a given time. As the pressure increases, more the solute dissolves into the solvent.
Therefore, the correct option for this question is C.
To learn more about Solubility, refer to the link:
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I think the correct answer from the choices listed above is option D. the substances cobalt and barium chloride will not react since cobalt os less active than barium so it does not have enough energy to displace barium in the compound. Hope this answers the question.
