Chemistry · Unit 3 · Chemical equilibrium systems · Chemical equilibrium
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A student performs an experiment in which sodium carbonate solution is heated in an open beaker on a Bunsen burner, causing carbon dioxide gas to evolve. (a) Identify whether this system is open or closed. [1] (b) Explain your classification using the behaviour of matter during the reaction. [1]
A reaction vessel is sealed with a rigid lid and contains nitrogen gas and hydrogen gas. The vessel is heated externally and ammonia gas forms inside. Which statement best describes this chemical system?
Which of the following describes a closed chemical system?