Aconsiderable amount of heat is required for the decomposition of aluminum oxide. 2 al2o3(s) â 4 al(s) + 3 o2(g) î´h = 3352 kj (a) what is the heat change for the formation of 1 mol of aluminum oxide from its elements?

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change. when the temperature in a room increases from 25°c to 33°c, changes from a solid to a liquid. in a lab, methane and nitrogen are cooled from -170°c to -200°c. the methane freezes and the nitrogen . when gold is heated to 2,856°c it changes from a liquid to a .

Stage in which a typical star has completely stopped fusion

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.