A thermo flask contains coffee it is violently shaken. considering the coffee as a system: has internal energy changed

A thermos flask contains coffee it is violently shaken. considering the coffee as a system: has heat been added to it?

A thermo flask contains coffee it is violently shaken. considering the coffee as a system: does its temperature rise?

Internal energy U of a system may change when

Which of the following statement is incorrect about internal energy? a) The absolute value of internal energy cannot be determined b) The internal energy of one mole of a substance is same at any temperature or pressure c) The measurement of heat change during a reaction by bomb calorimeter is equal to the internal energy change d) Internal energy is an extensive property