Question

1. which explains why a sealed calorimeter is a closed system? (1 point)

temperature is conserved.
work is done to the test sample.
thermal energy is not transferred to the environment.
the masses of the sample and water are equal.

Explanation:

To determine why a sealed calorimeter is a closed system, we analyze each option:

• "Temperature is conserved" is incorrect because temperature is a measure of thermal energy and is not conserved in the same way as energy; energy (including thermal) is conserved.
• "Work is done to the test sample" does not explain a closed system. A closed system relates to energy and matter transfer with the surroundings, not just work on the sample.
• "Thermal energy is not transferred to the environment" matches the definition of a closed system (in thermodynamics, a closed system can exchange energy but not matter with the surroundings; a sealed calorimeter prevents thermal energy (a form of energy) from escaping to the environment, fitting the closed - system concept for calorimetry purposes).
• "The masses of the sample and water are equal" is irrelevant to the definition of a closed system.

Answer:

Thermal energy is not transferred to the environment.