How does a solid state of water undergo a phase change into a liquid state? A. It releases heat while remaining at a constant temperature.
B. It absorbs heat while remaining at a constant temperature.
C. It releases heat as the temperature decreases.
D. It absorbs heat as the temperature increases.

Consider the following reaction at equilibrium. 2co2 (g) 2co (g) + o2 (g) h° = -514 kj le châtelier's principle predicts that the equilibrium partial pressure of co (g) can be maximized by carrying out the reaction a. at high temperature and high pressure b. at high temperature and low pressure c. at low temperature and low pressure d. at low temperature and high pressure e. in the presence of solid carbon