Can thermal energy be used to do work?

Answer:
yes thermal energy be uses to do work
exp. if we have a gas enclosed in a cyllinder with frictiion less piston,when we provide a themal energy then electrons aquire sufficient themal velocity and moving zig-zag path. so they change the volume of the gas and change the position of that piston.
so the work is done= F.d, here angle between force and distance is zero.
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