Liverpool defender Martin Skrtel finished from six yards after less than a minute, before guiding a header home for his second shortly after.
The Reds poured forward and Raheem Sterling tapped in before Daniel Sturridge added a fourth before half-time at Anfield.
There’s a long way to go. Nothing’s won, it’s just another game for us
Sterling then netted the fifth from close range in the 52nd minute, before Mikel Arteta dispatched his penalty after Steven Gerrard had brought down Alex Oxlade-Chamberlain.
The thumping victory left Liverpool fourth in the table and just five points behind Arsenal, but Sturridge was not interested in any title talk after the final whistle.
“We take every game as it comes, we won’t get too excited,” Sturridge told BT Sport. “We’ve got 13 games to go in the Premier League and there’s a long way to go. Nothing’s won, it’s just another game for us.
“We went out there and did what the manager told us to do. We worked hard as a team. The first 20 minutes were unbelievable. It was about the team and that’s what we’re trying to do – work as a team and get results.
“It starts form the back and the boys have been excellent. Martin Skrtel got two goals and Raheem Sterling two and got a well-earned man of the match for all the hard work he has put in.”
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