posted by Pat .
What is the reaction for 2NH4I+Cl2=2NH4Cl+I2
the equation simply shows that 2 moles of ammonium iodide reacts with 1 mole of Chlorine gas to produce 2 moles of ammonium chloride with 1 mole of Iodine.
You can check for the phase for each chemical so it'll help you to understand more on the reaction. The equation you gave have no phases (aqueous, liquid, solid or gas) for each species. check for them on google or other sites and hopefully you can add more to what i posted.