Question

chemistry Q54 Homework Unanswered What type of energy is increasing in the following situations? Premise Response Drag and drop to match 1 Turon a Lightbulb > A Kinetic An falls from a table Internal Water begins to boil - Potential Water begins to freeze = D Potential 5 Astead rollis on la round Cru

Answer 1

Q5.4 1. Turning on a light bulb: will increase the Potential Energy, due to which a voltage difference is created and the current flows. 2. An egg falls from a table: the kinetic energy will increase as it will start to move. 3. Water begins to boil: the internal energy of the water molecules will increase due to the heat energy give. 4. Water begin to freeze: the potential energy of the each and every water molecule will increase because of the fact that they will come to rest in a solid state, whereas in case of liquid form they're moving. 5. A skate board rolls on a ground: will increase the kinetic energy as it starts to move and we know that anything that's in motion will have kinetic energy

Q5. 48: For an exothermic reaction, the following statements are true; 1. AH<0; since it releases energy. The enthalpy change is negative. 2. And the products have lower enthalpy than reactants; which is why the difference is negative in the above case. 3. The system emits energy as heat; due to bond enthalpy changes, the system will release the energy in the form of heat. For example, Burning of natural gas: CH, +20, CO, + 2H,0 So the options A, C and F are correct regarding the exothermic reaction.

Q5. 49a: The balanced chemical equation is given by: 2 H2 + O2 = 2 H2O So the coefficients are, 2,1 and 2 respectively. And the above reaction is a synthesis type of reaction. As the energy is released during the reaction, it is an exothermic reaction.