This study presents a method for teaching the subject of chemical equilibrium in which students engage in self-learning mediated by the use of a new multimedia animation (SEQ-alfa©). This method is presented together with evidence supporting its advantages. At a microscopic level, the simulator shows the mutual transformation of A molecules into B molecules and vice versa for the reversible one-step chemical reaction, A(g) ⇔ B(g). The user defines the reaction as endothermic or exothermic and sets a given reaction temperature; SEQ-alfa© then calculates the kinetic constants of the forward and reverse reactions. Based on initial given concentrations, the animation then evaluates the respective rates and concentrations, as well as the concentration quotient value, as the reaction progresses towards its equilibrium state. SEQ-alfa© also demonstrates the effects of concentration and temperature alterations on the reaction's progress and the value of the reaction quotient until equilibrium is reached, thus giving the equilibrium constant. In addition, a validation of this new approach was carried out with 27 teachers. A pre-test and post-test of students’ understanding of the basic concepts of chemical equilibrium were conducted. Tested groups attained a 50% average learning gain (n_exp = 130, n_ctrl = 26). Those students with little or no previous knowledge acquired a better understanding of chemical equilibrium. In addition, 80% of teachers agreed that the multimedia resource and its complementary activities had positive effects.

中文翻译：

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一种新型的化学平衡教学多媒体应用

这项研究提出了一种化学平衡问题的教学方法，学生可以通过使用新的多媒体动画（SEQ-alfa©）进行自我学习。与支持它的优点的证据一起提出了该方法。在微观层面上，模拟器显示了A分子相互转化为B分子的过程，反之亦然对于一步可逆化学反应，A（g）⇔B（g）。用户将反应定义为吸热或放热，并设置给定的反应温度；SEQ-alfa©然后计算正向和反向反应的动力学常数。根据初始给定的浓度，动画会在反应进行到平衡状态时评估各自的速率和浓度，以及浓度商值。SEQ-alfa©还证明了浓度和温度变化对反应进程的影响，以及直至达到平衡的反应商的值，从而给出了平衡常数。此外，还有27位教师对这种新方法进行了验证。进行了学生对化学平衡基本概念的理解的预测试和后测试。受测群体的平均学习增益为50％（n _exp = 130，n _ctrl = 26）。那些以前很少或根本没有知识的学生对化学平衡有了更好的理解。此外，80％的教师同意多媒体资源及其补充活动具有积极作用。