Two Solutions, Initially at 24

question 93

Multiple Choice

Two solutions, initially at 24.69 °C, are mixed in a coffee cup calorimeter (C_cal = 105.5 J °C^-1) . When a 200.0 mL volume of 0.100 mol L^-1 AgNO₃ solution is mixed with a 100.0 mL sample of 0.100 mol L^-1 NaCl solution, the temperature in the calorimeter rises to 25.16 °C. Determine the Δ_rH°, in units of kJ mol^-1. Assume that the density and heat capacity of the solutions is the same as that of water. Hint: Write a balanced reaction for the process.

• A)-32 kJ mol^-1
• B)-78 kJ mol^-1
• C)-64 kJ mol^-1
• D)-25 kJ mol^-1
• E)-52 kJ mol^-1

---

Definitions:

Unstable Causes

Factors or conditions that contribute to fluctuations or irregularities in a system or situation, leading to unpredictability or instability.

Environmental Conditions

The external factors and surroundings that can influence the life, growth, behavior, and survival of organisms or systems.

Own Behavior

Refers to an individual's actions or conduct that they are personally responsible for or in control of.

Sense of Purpose

The motivation that drives individuals or groups to achieve goals and objectives, providing direction and meaning to actions or projects.