What will happen if the ice is added to the water? A The ice will undergo a chemical change, melting into a liquid and changing into a new substance.

B The water will undergo a chemical change, freezing into a solid and changing into a new substance.

C The ice will undergo a physical change, melting into a liquid but remaining the same substance.

D. The water will undergo a physical change, freezing into a solid but remaining the same substance.

Identify a specific example for each type of technology

Stage in which a star’s outer layers have started to cool and grow outward?

There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. in the first step, calcium carbide and water react to form acetylene and calcium hydroxide: cac2 (s) + 2h2o (g) → c2h2 (g) + caoh2 (s) =δh−414.kj in the second step, acetylene, carbon dioxide and water react to form acrylic acid: 6c2h2 (g) + 3co2 (g) + 4h2o (g) → 5ch2chco2h (g) =δh132.kj calculate the net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxide from these reactions. round your answer to the nearest kj .