Answer
A vacuum is a space void of matter
If there are no particles there is no movement of particles, so t
Since there is no matter inside the walls of the flask, the flask will not absorb any energy, so the heat will remain in the flask.
here is no kinetic energy.
Work Step by Step
Since there is a vacuum in the walls of the flask, there are no particles in the walls
There is no kinetic energy inside the walls of the flask
If liquid nitrogen is poured into the container, no heat will be transferred