If the total amount of energy required to change a substance to a different phase and temperature is positive, then does that mean that the phase change has moved in the direction of solid gas or gas - solid and has the temperature increased or decreased?
A. solid-gas temperature increase
B. solid-gas temperature decrease
C. gas sold temperature increase
D. gas - solid temperature decrease

Ahypothrticalax type of ceramic material is known to have a density of 2.10 g/cm3 and a unit cell of cubic symmetry with a cell edge length of 0.57 nm. the atomic weights of the a and x elements are 28.5and 30.0 g/mol, respectively. on the basis of this information, which of the following crystal structures is (are) possible for this material: sodium chloride, cesium chloride, or zinc blende

Can someone me with these questions plz.

Reaction rate depends on how many molecules are coming into contact with each other with enough energy to react. increasing the temperature of the reactants will increase -