Use the Following Data to Calculate the Enthalpy Change for the Following

question 50

Multiple Choice

Use the following data to calculate the enthalpy change for the following reaction: $$\begin{array} { l c } { \mathrm { K } ( s ) + \frac { 1 } { 2 } \mathrm { Cl } _ { 2 } ( g ) \rightarrow \mathrm { KCl } ( s ) } & \\ { \text { Quantity } } & \text { Magnitude } ( \mathbf { k J } / \mathbf { m o l } ) \\\text { Ionization energy of } \mathrm { K } ( g ) & 425 \\\text { Electron affinity of } \mathrm { Cl } ( g ) & - 349 \\\text { Vaporization energy of } \mathrm { K } ( s ) & 89 \\\text { Bond energy of } \mathrm { Cl } _ { 2 } ( g ) & 240 \\\text { Lattice energy of } \mathrm { KCl } ( s ) & - 723\end{array}$$

• A) -603 kJ/mol
• B) -11.0 kJ/mol
• C) 405 kJ/mol
• D) -318 kJ/mol
• E) -438 kJ/mol

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Definitions:

Discount Rate

This rate, integral to discounted cash flow analysis, is employed for determining the present value of cash flows expected in the forthcoming periods.

Compounding

Compounding in finance refers to the process where an asset's earnings, from either capital gains or interest, are reinvested to generate additional earnings over time.

Compound Interest

Interest calculation that encompasses both the initial principal and the cumulative interest that has accrued in preceding periods on a deposit or loan.

Simple Interest

A way of calculating interest where the interest charge is based on the original principal amount alone.