Question

(a) Why is ice at 273K more effective in cooling than water at the same temperatures ?
(b) Which gas is called dry ice?

Answer 1

(a) "At 273 Kelvins, water is less effectivethan ice because ice can easily form water by absorbing surrounding heat energy, whereas water has no such property and therefore ice gets cooled(changes into water) faster than water at "same temperature".
(b)carbon gas

Answer 2

Answer:

b. carbon dioxide is called dry ice.