A reaction occurs between two gases when they are mixed. Which is the most likely effect on reaction rate if the gases are mixed at the same temperature but at higher pressure? 1. Reaction rate increases because the molecules collide more often.
2. Reaction rate increases because the molecules collide with more force.
3. Reaction rate decreases because the molecules have less room to move.
4. Reaction rate stays the same because the molecules move at the same speed.