При сжигании 5,6 л (н. у.) ацетилена С2Н2 выделилось 324,8 кДж теплоты. Рассчитайте тепловой эффект реакции, уравнение которой

John hasn't won a medal yet.
Have you ever climbed a mountain?
Tony hasn't tried kayaking yet.

1. Daniel has already seen that film.
2. We have not been kayaking yet.
3. Jane has not finished her homework yet.