Hello scream2005,
Let me help you with this.
Please note the Operating System is constantly running different processes and services internally that an increase processor usage. Having the temperature at 72C is still under the expected temperature but if you are using just Google Chrome it would be good idea to do some troubleshooting steps.
Check the following link that contains very important information:
http://www.intel.com/support/processors/sb/CS-029426.htm?wapkw=overheating
This also has more material:
http://www.intel.com/support/processors/sb/CS-029300.htm?wapkw=overheating
Kevin M