Almost..!
When you do weight training, your energy is spend in : 60% muslce gain along with 40% fat loss for the first 40 minutes. If you exceed your workout time to 1.5 or 2 hours then you’ll see : 70% fat loss along with 30% fat gain i.e if you are fat and wish to gain muscle and lose fat in a single go then increase your weight training to atleast 90 minues but if you are thin and wish to gain muscle only without losing weight then stick to 30 minutes intense workouts.
Stay fit !