Final answer:
The question is about calculating the heat absorption or release in a coffee cup calorimeter when ammonium nitrate is mixed with water, which relates to high school-level Chemistry.
Step-by-step explanation:
The question pertains to a coffee cup calorimeter experiment, which is a theme in the study of thermochemistry, a branch of Chemistry. A coffee cup calorimeter is a simple calorimeter that is often used in high school or introductory college Chemistry classes to measure the heat transfer associated with chemical reactions or physical processes.
In the context of the question, the student is asked about the heat absorption or release when 1.6g of NH4NO3 (ammonium nitrate) is mixed with 75g of water at an initial temperature of 25°C. The use of NH4NO3 in a calorimeter context is usually to observe an endothermic process, which is a process that absorbs heat from its surroundings, causing the solution temperature to decrease.
The calculation of the heat of dissolution (AHsoln) for the salt in water can be done by considering the mass of the substances, their specific heat capacities, and the change in temperature. This requires the application of the formula q = m × Cs × ΔT, where q is the quantity of heat absorbed or released, m is the mass of the substance in grams, Cs is the specific heat capacity, and ΔT is the change in temperature in degrees Celsius.