Which of the following correctly describes the process of melting a block of ice that is initially at -5 degrees Celsius? Assume the pressure is a constant 1 atmosphere.
1) The ice absorbs heat from the surroundings and its temperature increases.
2) The ice absorbs heat from the surroundings and its temperature remains constant.
3) The ice releases heat to the surroundings and its temperature increases.
4) The ice releases heat to the surroundings and its temperature remains constant.