When a sealed thermos bottle full of hot coffee is shaken what are the changes in the temperature of the coffee and the internal energy of the coffee?

There is large increase in temperature of the coffee due to the large amount of kinetic energy imputed into the system through the shaking motion. Thus due to the heat being released there is a large decrease in the internal energy of the system

Pe = 1/2k(x)^2  and .05n/m = .05x10^-9m = x