If a muslim converts to christinaity or judaism, will he/she enter paradise?

So a friend of mine converted from Islam. Christianity. She's an amazing friend to me and to others, and i don't want her to end up in hell. She always helps people, does charity, is nice & kind etc. Will she burn in hell, or will she enter heaven? Or will she stay there for a a cerain amount of time? Btw, Note that i said that she WAS a muslim at first, converted to Christianity a few days ago. Thank you for your answers!