Question

40cm3 of acid were mixed with 60cm3 of alkali in an insulated container. The average temperature of the two solutions before they were mixed was 19.5°C. The temperature after mixing was 27.5°C. Was this an exothermic or an endothermic reaction?

Answer 1

Answer:

Explanation:

d

Answer 2

This reaction was exothermic. In an exothermic reaction, energy is released and the temperature of the system increases.

• The temperature increased from 19.5°C to 27.5°C, which indicates that energy was released during the reaction. When acid and alkali are mixed, they react to form salt and water. This reaction is exothermic, meaning that it releases heat energy.

• The increase in temperature observed in this experiment supports the conclusion that the reaction was exothermic.

• Energy is a property of matter that allows it to perform work. Energy exists in many forms, including kinetic energy, thermal energy, potential energy, and electromagnetic radiation. It can be transferred from one system to another, or transformed from one form to another.
• Energy is an essential component of the universe and is required for processes such as motion, growth, and chemical reactions. Energy cannot be created or destroyed, but it can be transformed from one form to another. The law of conservation of energy states that the total amount of energy in a system remains constant, although it may change form.

To know more about  energy visit:

https://brainly.in/question/13599850

https://brainly.in/question/3715028

#SPJ3