If you have feeders and waterers set up that will last you at least a week, then you should be fine. Assuming they have a secure run attached to a coop that is always open to the run. Meaning, you don't want to lock them up in a coop for a week. That would be cruel. If you don't have such a setup, then you will want a friend or neighbor to come twice a day to let them out of the coop in the morning and put them away at night.
Also to consider are the eggs. Do you have a rooster? If so, should you have a hen that might go broody, you could come home to a hen sitting on eggs that will hatch new chicks in two weeks. Which is fine, if you're prepared for that. Otherwise, you will probably have a big pile of eggs to eat when you get home. Provided it's not over 90F where you are, the eggs will be fine. Best solution though is to have a friend stop by every 2-3 days, pick up eggs and check their food and water.