For his first, he brought down Chris Brunt's long ball expertly with his right foot before lashing in with his left, and for his second, he pounced on a poor attempted pass by Leandro Bacuna and deftly chipped Brad Guzan.
Regarding his opener, the Republic of Ireland international said: "I think nine times out of 10 I wouldn't get a touch like that - I surprised myself!"
Long admits scoring in the Chelsea match - his first goal of the campaign - was important for his confidence.
He now has four goals in his last four games for club and country, and Long said:
"Trying to get that first goal of the season is always a monkey on your back.
"It was a relief. Hopefully I can keep up this form between now and the end of the season and keep my place in the starting XI."
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