Give two differences between a physical change and a chemical change. ii. Explain whether condensation of water vapour is a physical or a chemical change. iii. Write word equations for the following reactions: a. Breaking down/ electrolysis of water b. synthesis of water c. decomposition of sugar d. photosynthesis in plants
Answers
Answer:
Explanation:
i) In a physical change, the molecules are rearranged while their actual composition remains same. In a chemical change, the molecular composition of a substance completely changes and a new substance is formed. Some example of physical change are freezing of water, melting of wax, boiling of water, etc.
ii) Condensation is not a chemical change because no new compounds result, and the process can be reversed by adding energy or removing the pressure. The condensation of water vapor is the most common example because it is happening around us on a continuous basis.
iii) a. 2 H2O(l) → 2 H2(g) + O2(g
b. 2H2 + O2 -----> 2 H2O
c. C12H22O11 (s) + H2SO4 (aq) + 1/2 O2 (g) → 11 C (s) + CO2 (g) + 12 H2O (g) + SO.
d. 6CO2 + 6H2O → C6H12O6 + 6O2.
PLS MARK ME AS THE BRAINLIEST