객관식
Suppose that 0.44 g of water at 25 °C condenses on the surface of a 51-g block of aluminum that is initially at 25 °C. If the heat released during condensation goes only toward heating the metal, what is the final temperature (in °C)?
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8. Thermochemistry
Heat Capacity
Multiple Choice
When calculating the heat of solution in a calorimeter, which of the following is assumed to be negligible?
A
The mass of the water
B
The specific heat of the salt
C
The temperature change of the solution
D
The specific heat of water
검증된 단계별 안내1
Understand the concept of heat of solution: When a solute dissolves in a solvent, it can either absorb or release heat. This is measured using a calorimeter.
Identify the components involved in the calorimeter: Typically, this includes the solute (salt), the solvent (water), and the calorimeter itself.
Recognize the assumptions made in calorimetry: In many calorimetry problems, certain factors are considered negligible to simplify calculations. These can include the heat capacity of the calorimeter itself or the specific heat of the solute.
Focus on the specific heat of the salt: In this problem, the specific heat of the salt is assumed to be negligible. This means that the heat absorbed or released by the salt itself is not considered in the calculation.
Consider the implications of this assumption: By assuming the specific heat of the salt is negligible, the calculation focuses on the heat exchange between the water and the calorimeter, simplifying the process and allowing for the determination of the heat of solution based primarily on the water's properties.
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