The difficulty in learning thermodynamics students do not understand the heat flows because of the difference of the temperature of objects. Students thought that heat exchange would or occur until every object had the same amount of heat energy. As Kesidou and Duit (1993), students held alternative conceptions that it is possible thought that coffee had become warm because temperature differences might occur by these students did not think that all real processes take place by themselves in only one direction. In contrast, Libyan students answered by referring to their everyday experiences. Thus, half of students could give the correct answer that it was impossible that the objects had become warmer when they were at the same temperature of the surroundings. However, Libyan students still have problems with description to produce detailed and consistent predictions about all the features of the system.