Answer:
The heat absorbed by the process is -1,634.27 J
Explanation:
Here, we have
Mass of KCl = 6.4 g
Mass of water = 42 g
Initial temperature of water = 20.60°C
Final temperature of the water = 11.30°C
Specific heat capacity of water = 4.184 J/g·°C
Based on the principle of conservation of energy, which states that energy can neither be created nor destroyed, but changes from one form to another, we have
The heat absorbed in the process is equal to the heat lost by the water present in the dissolution
Heat lost by water = ΔH = 42 × 4.184 × (11.3 - 20.6) = -1,634.2704 J
Heat lost by water = 1.63 kJ
∴ The heat absorbed by the process = -1,634.2704 J
The electrons excited by sunlight are replaced by electrons from Photosystem II in Photosystem I, and by electrons from water in Photosystem II.
Answer:
The type of bond formed in FeS would be <u>Polar Covalent Bond</u>.
Explanation:
Types of Bonds can be predicted by calculating the difference in electronegativity.
If, Electronegativity difference is,
Less than 0.4 then it is Non Polar Covalent Bond
Between 0.4 and 1.7 then it is Polar Covalent Bond
Greater than 1.7 then it is Ionic Bond
For Fe and S,
E.N of Sulfur = 2.58
E.N of Iron = 1.83
________
E.N Difference 0.75 (Polar Covalent Bond)
The phenomenon that releases uncontrolled amounts of energy very fast is fission, and that is what is used in bombs.
The last option is correct.