2000 accord rpm goes up but acceleration is slow?

Ive been having trouble with my car lately everytime I try to speed up the rpm meter goes up but the acceleration is so slow its getting to the point were im having trouble going up a hill without it slowing down, I tried to take it to vegas and when i was driving uphill i was going slower n slower even though i was pressing on the gas the same and trying to press on the gas more made it even worse. When i had pulled over to the side and stoped smoke was coming out the hood but the temperature was fine i dont know what to do

My honda accord is a 2000 LX with 170000 mileage and its manual not automatic

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