Chapter 1 - Chemistry: The Study of Change - Questions & Problems: 1.12

Please see the work below.

Work Step by Step

We know that a. The given statement shows a physical change because the helium gas is not changed by leaking out of the balloon. b. The given statement shows a chemical change in the battery. c. The given statement shows a physical change as the orange juice can be recovered back by evaporation of the water. d. The given statement is a chemical change because photosynthesis changes water $CO_2$ into organic matter. e. The given statement shows a physical change as the salt can be obtained again by evaporation.

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