Answer:
Explanation:
1) Alkali metals and halogens both need to achieve a stable outer electron shell, requiring alkali metals to lose one electron and halogens to gain one.
2) They share an identical count of outer shell electrons.
3) Typically, they have elevated melting points.
4) They exhibit low reactivity or none at all.
5) They belong to group 7.
Refer to the attached image. This does not depict the polymerization reaction of salicylic acid. It merely illustrates the structure of salicylic acid and what it looks like post-polymerization. The polymerization occurs through the linking of salicylic acid molecules, resulting in the formation of one water molecule.
The enthalpy of hydration for copper sulfate is -1486.62 kJ/mol, indicating that 1486.62 kJ of energy is absorbed by a mole of copper sulfate during its hydration. Step 1: Calculate the energy released per mole of dissolved substance (Eq. 1). If 0.102 moles release 55.51 kJ, then 1 mole corresponds to 541.85 kJ/mol. Therefore, ΔH = -541.85 kJ/mol. Step 2: Identify the energy absorbed by dissolved substance (Eq. 2). When 0.101 moles absorb 95.31 kJ, 1 mole will absorb 944.77 kJ/mol, thus ΔH = 944.77 kJ/mol. Step 3: Subtract Eq. 2 from Eq. 1. Thus, ΔH = -541.85 kJ/mol (Eq. 1) and ΔH = 944.77 kJ/mol (Eq. 2), leading to ΔH = -541.85 - 944.77, so ΔH = -1486.62 kJ/mol.
