Answer:
Being a reaction that releases heat, it is considered exothermic.
Explanation:
That is why if we consider it exothermic, the heat that is released to the medium is chemical energy lost from the interaction between the chemical bonds throughout the reaction. Having said this, we can affirm that the energy of the links of the products IS LESS than that of the REAGENTS, otherwise it happens in the endothermic ones, where it occurs in a vice versa.
These processes tend to have greater entropy and greater disorder in the reaction, greater kinetic energy between the particles.
From the periodic table:
molar mass of barium = 137.2 grams
molar mass of oxygen = 16 grams
molar mass of hydrogen = 1 gram
molar mass of Ba(OH)2 = 137.2 + 2(16) + 2(1) = 171.2 grams
molar mass of 4H2O = 4 [2(1) + 16] = 72 grams
molar mass of Ba(OH)2.4H2O = 171.2 + 72 = 243.2 grams
Therefore, each 243.2 grams of <span>barium hydroxide tetrahydrate contains 72 grams of water, thus, 92.8 grams will contain:
mass of water in 92.8 grams = (92.8 x 72) / 243.2 = 27.474 grams
Based on this, when </span>a 92.8 gram sample of Ba(OH)2•4H2O (barium hydroxide tetrahydrate) is heated until water is released, 27.474 grams of water will be released.
Correct answer is 20 kJ; 50 kJ
potential energy is resting energy, that peak that's 75 kJ would be the kinetic energy
Answer:
D: Atmospheric pressure is greater than vapor pressure,and water molecules escape from the solution into the air.