Answer:
А Molecular energy will decrease, and the substance will change from a gas to a liquid.
Step-by-step explanation:
The right choice is that molecular energy will decrease for the system and the substance will change from a gas to a liquid.
- When thermal energy is removed from a system, molecular energy reduces.
- Thermal energy is a form of kinetic energy
- The energy causes an increase in the average speed of the molecule in a substance.
- When the energy is removed, the molecular speed reduces and this causes a gas to condense to liquids.