Simon and Nirav are carrying out an investigation to find which of the metals X or Y produces the higher temperature in a reaction with hydrochloric acid. Simon measure out 10 cm3 of hydrochloric acid in a test tube. he measures the temperature and then places a small piece of metal X into the acid. He sees bubbles of gas given off. when the reaction finishes, he measures the temperature again. Nirav measures out 10 cm3 of hydrochloric acid in a test tube. He measures the temperature and then places a piece of metal Y into the acid. He also sees bubbles of gas given off. when the reaction finishes, he measures the temperature again.
which variable did Simon Nirav need to change in their experiment?
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bubbles of gas given off. when the reaction finishes, he measures the temperature again.
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