Learning Path
Question & Answer1
Understand Question2
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Explore TopicChoose the Best Answer
A
pressure
B
temperature
C
volume
D
concentration
Understanding the Answer
Let's break down why this is correct
Answer
In bomb calorimetry, the primary measurement taken to determine the energy change of a reaction is the change in temperature of the calorimeter. The bomb, containing the sample, is ignited and the heat released raises the temperature of the surrounding water and calorimeter. By measuring how much the temperature rises, and knowing the heat capacity of the system, we can calculate the heat released or absorbed. For example, if a sample causes the temperature to rise by 2 °C and the calorimeter’s heat capacity is 4 kJ/°C, the reaction released 8 kJ of heat.
Detailed Explanation
When a substance burns in the bomb, the heat released moves into the surrounding water. Other options are incorrect because Many think pressure changes show energy change, but in the sealed bomb the pressure stays nearly the same; Volume is a measure of space.
Key Concepts
Energy change in reactions
Calorimetry techniques
Heat of combustion
Topic
Bomb Calorimetry
Difficulty
easy level question
Cognitive Level
understand
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