When 50.0 ml of water containing 0.50 mol hcl at 22.5°c are mixed with 50.0 ml of water containing 0.50 mol naoh at 22.5°c in a calorimeter, the temperature of the solution increases to 26.0°c. how much heat (in kj) was released by this reaction? note: the specific heat of water (cwater) is 4.18 j/(g•˚c) and the density of the solution is 1.00 g/ml.

Explanation:

Hello,

At the specified conditions, to compute the released heat due to the mixing process, which also includes the effect of the reaction enthalpy, we take into account the following formula:

All of the terms listed above are considered as changes. Thus, the enthalpy due to the water heating turns out into:

Now, it is found that the enthalpy of the carried out reaction:

Has a value of -56.72kJ/mol but as 0.5 mol are involved, the total enthalpy turns out into -28.5kJ

Now, that reaction enthalpy is by far higher than the enthalpy due to the temperature increasing, thus, one concludes that the total released enthalpy is negative and has a value of:

Best regards.

water   molecules stay close to each other through cohesion, the collective action of hydrogen bonds between water molecules. cohesion plants draw water upwards from the root through the stem's transport tubes (xylem) to the leaf. this transport occurs even in large trees and against gravity. transpiration, evaporation of water from plant leaves, creates a tension on water molecules being pulled up from the stem and roots.

water also has high (the attraction of one substance to another) properties because of its polar nature. adhesion of water molecules to plant cell walls counteract gravity while water is transported from roots to leaves.

water exhibits a very high surface tension when compared to other liquids. surface tension is a property of a liquid that holds the surface together and allows it to resist an external force. by capillary action, the water forms concave menisci inside the pores. the high surface tension of water pulls the concavity outwards, generating enough force to lift water from the roots to the leaves of plants.

thus, cohesion, along with adhesion and surface tension creates a capillary action that keeps water molecules interacting and moving through the plants out to the leaf cells.

therefore, option d) is the correct answer.

explanation:

they are made of gases.

they have a spherical shape.

they make energy through fusion.