Explain why a reaction that is spontaneous in one direction is non-spontaneous in the reverse direction

Aluminum reacts with chlorine gas to form aluminum chloride via the following reaction: 2al(s)+3cl2(g)→2alcl3(s) what is the maximum mass of aluminum chloride that can be formed when reacting 32.0 g of aluminum with 37.0 g of chlorine? express your answer to three significant figures and include the appropriate units.

Different isotopes indicate that an element will have different numbers of

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?