CHEM 111 Theory Questions: Gas Law Problem and Classification of Changes

100 Level Department of Community Health exam questions and detailed answers. Download the answers in document format. Correct, detailed, and straightforward answers.

Questions:

(a) 375 cm³ of a gas has a pressure of 770 mmHg. Find its volume if the pressure is reduced to 750 mmHg.

(b) Identify which of the following is a physical or chemical change:
(i) Photosynthesis
(ii) Burning of waste (dirty)
(iii) Cooking food
(iv) Burning of a candle

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