When plants began to evolve, oxygen levels in the atmosphere , which allowed animals to evolve. Which word completes the sentence? Increase, decrease or stays the same ??

An exothermic reaction is conducted in an insulated calorimeter filled with water. the calorimeter is then sealed so that there is no heat exchanged between the contents of the container and the surrounding air. which of the following statements is true about the reaction?

How much energy is made when a pice of wood burns. how do you know

Suppose that during that icy hot lab 65,000 j of energy were transferred to 450 g of water at 20°c what would have have been the final temperature of the water