a student uses a bunsen burner to heat a samp...
a student uses a bunsen burner to heat a sample of mercury(ii) oxide in a test tube. when the temperature of the mercury(ii) oxide reaches 500°c, it decomposes to form shiny liquid mercury and oxygen gas. complete the sentences. when mercury(ii) oxide decomposes, the reaction heat, and the test tube heat. the decomposition of mercury(ii) oxide is an process.
Answer
# Explanation:
## Step1: Analyze the reaction
Mercury(II) oxide decomposes when heated. The reaction needs heat input (absorbs heat) as it is decomposition upon heating. The Bunsen burner (external source) provides heat to the test - tube (so the test - tube releases heat to the reaction). Decomposition reactions that absorb heat are endothermic.
# Answer:
When mercury(II) oxide decomposes, the reaction absorbs heat, and the test tube releases heat. The decomposition of mercury(II) oxide is an endothermic process.