The best advice I can give is to talk with an attorney regarding your specific situation. You state you live in Los Angeles but posted the question in Maricopa, AZ. The rules vary from state to state.
Here are some links to helpful information from the State of Arizona if you are in AZ.
As far as breaking the lease, i dont know about madating the tenant complete an open house, maybe allowing the landlord to complete a open house... but you need to check the specific language, does it allow you to give a 30 day, 60 day or 90 day notice to move out? If in doubt use your free first meeting with an attorney to get some direction.
Sorry to hear about your issue.
Your lease contract should specifically address the issues revolving around an early lease termination by you. Since, I do not have the contract cannot know what it says. However, I recommend that you read it. Consider asking your attorney for advice.
You can review the "tenant bill of rights" at The Arizona Department of Real Estate website or ask your Realtor for a copy. If you need a copy of the bill of rights, let me know.
Jeff Masich, Realtor
Arizona Homes and Land