Pork chops can take between 15 minutes and an hour to cook, depending on a host of variables. These include thickness, whether you've stuffed them, and if they're in a sauce and covered by foil. Temperature isn't likely to affect your time -- 350 degrees Fahrenheit provides a good all-purpose heat for many pork chop recipes.
Thirty Minutes, Give or Take
Take as one example stuffed pork chops, 3/4 inch thick. These should take around 30 minutes in a 350 F oven to complete baking, so that the stuffing cooks through. Unstuffed, thinner pork chops take less time, and thicker pork chops take longer. Also, the more chops in the oven, the longer they'll take to cook. Stuffed and placed in a lidded ovenproof dish with stock, the chops may take 1 hour in the oven.
The Thermometer Test
For perfect results, pay attention to how the chops look and smell. Confirm your impression of doneness with a digital meat thermometer. Remove unstuffed chops when the meat reading hits between 140 and 145 F, and let them rest for 3 minutes. A second reading should read 145 to 155 F, ideal for firm but not hard chops with moist, pink juices. For stuffed chops, check that the stuffing reaches 165 F for safe results.