No, 100 ml per hour is way too little in many circumstances. That would mean only 1 l over a 10 hour hike. Anyone that's been on a 10 hour hike, even not in particularly hot or dry weather, can tell you that's not nearly enough.
For hiking in hot desert conditions, 1 l per hour (10 times your suggestion) is more like it. I have done significant hiking in the deserts of Arizona, New Mexico, and Utah, and I can tell you the 1 l per hour is a much more reasonable figure. I usually bring a gallon and turn around when it gets to half a gallon. Sometimes that has been in less than 2 hours. Sure, I could have survived with a bit less than that, but I drank whenever I felt thirsty.
However, trying to survive in such conditions with only 1 l for 10 hours is downright dangerous. After only a few 10s of minutes you'd feel a little thirsty. After one hour, even with drinking 100 ml, you'd definitely feel thirsty. It wouldn't be dangerous yet, but just being uncomfortable is not a good thing. It keeps your mind off of other things you should be paying attention to and can interfere with rational decision making. Besides, you're probably out there or the enjoyment, and hiking around the hot desert when you're thirsty is not enjoyable.
After two hours, even with 200 ml total to drink, you're going to be very thirsty. This still isn't by itself dangerous, but it's starting to get there. Soon you'll feel yourself dragging. Your ability to hike at normal speed will go down.
If you don't turn around NOW, you'll be in serious trouble. Even if you do turn around now, you've got another 2 hours at least to get back, although probably more since you'll be dragging. After 4 hours with only 400 ml, you'll be very thirsty and the dehydration will have some effects on your body. If you make it back to the car after 4 hours and 400 ml, you drink a decent amount then, rest in the car in the shade for a while, you should be OK.
However, if you didn't turn around after 2 hours, you're headed for trouble. You are already somewhat dehydrated, although not enough for long term harm yet. But staying out there with only 100 ml per hour in the hot desert will only degrade your condition. After another hour or two, you probably won't be able to go much farther. Getting out on your own is no longer a option. You are now too weak for that. Your body tries to conserve the water it has, and reduces sweating. This can lead to heat stroke, especially if you can't get out of the sun or your mind is too foggy to figure out how.
This is the beginning of the end. Even if you find shade and maybe not succumb to heat stroke, your kidneys will start shutting down and waste products start building up in your blood. A little while longer, and the kidneys will start to become irreversibly damaged. At the same time, your blood volume goes down, and your heart has a harder time pumping what's left. If you're lucky, you pass out before your heart gives up and you die of cardio-pulminary arrest. In a few days, the coyotes tear thru your clothes and pick the large chunks of meat off your bones, then the turkey vultures pick off the rest, and the rodents gnaw on the remaining bones for the calcium.
Some day someone will find the few larger bones that haven't been scattered, and you've become a statistic. If they discover your pitiful 1 l water bottle, you may even be mentioned in future lectures where the audience is shown pictures of your remains and told not to do what that moron did.