Answer: Only energy can enter or exit a closed system
Explanation: Apex
The mass and energy in a closed system did not change, it conserved. In a reaction, the mass of the reactant will be equal to the mass of the product.
A closed system is a thermodynamic system, in which there is no transfer of energy and mass with the outer environment. There is no change in a system to take place.
Thus, the mass and energy in a closed system did not change, it conserved. In a reaction, the mass of the reactant will be equal to the mass of the product.
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