Two Solutions, Initially at 24 $\Delta$ _rH° for the Reaction as Written Below

question 122

Multiple Choice

Two solutions, initially at 24.60 °C, are mixed in a coffee cup calorimeter (C_cal = 15.5 J °C^-1) . When a 100.0 mL volume of 0.100 mol L^-1 AgNO₃ solution is mixed with a 100.0 mL sample of 0.200 mol L^-1 NaCl solution, the temperature in the calorimeter rises to 25.30 °C. Determine the $\Delta$ _rH° for the reaction as written below. Assume that the density and specific heat capacity of the solutions is the same as that of water. NaCl(aq) + AgNO₃(aq) ? AgCl(s) + NaNO₃(aq) $\Delta$ _rH° = ?

• A)-35 kJ mol^-1
• B)-60 kJ mol^-1
• C)-250 kJ mol^-1
• D)-16 kJ mol^-1
• E)-140 kJ mol^-1

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Definitions:

Traditionally Polyandrous

Describes societies or cultural practices where a woman has more than one husband at the same time.

Polygyny

A form of marriage in which a man is allowed to have more than one wife.

Serial Monogamy

A marriage form in which a man or a woman marries a series of partners in succession.

Extended Family

A family unit that extends beyond the nuclear family to include other relatives such as grandparents, aunts, uncles, and cousins.