Welcome to Tom's Hardware Forums,
Here's how to find out about your computer's hardware http://www.piriform.com/speccy
which may just tell you more than you'll want to know
Your motherboard has an accompanying list of CPU's it will support which is found on the manufacturers support site (usually). That information would be critical here since one CPU is single core and the other dual. The swap should physically work, motherboard compatability could be an issue though.
Hope it helps some