thermodynamics - first law?

Question

Hello,
is the following statement true or not ? (not the grammer)

"the energy transfer between a system and the surrendings can only be done by heat, work and mass transfer"...

if I say this, can someone exploit with the question of what if ...?

thanks...

Answer 1

first law of thermodynamics states that the change of thermal energy or internal energy of the system is equal to the sum of heat absorbed and work done be the system.
it can be simplified by an equation;

delta U = /Q - W/

thermodynamic equilibrium can be attained if delta U is equal to zero.

looking at your statement, yes, its TRUE, energy transfer can be done by heat, doing work and altering different factors such as volume, temperature, and pressure.

Answer 2

The increase in the internal energy of a thermodynamic system is equal to the amount of heat energy added to the system minus the work done by the system on the surroundings.