The reaction between H2SO4 and NH4OH does not produce gaseous ammonia; instead, it results in the formation of ammonium sulfate and water. While some ammonia may dissociate in solution, the primary product is a salt. This reaction is commonly utilized in fertilizer production. If NH4OH is heated, it can release ammonia gas. Overall, sulfuric acid's presence leads to protonation, preventing significant ammonia gas release.