1st - unit 4 - lesson 1

The temperature of a body is the average kinetic energy of its constituent molecules

• 1. true

• 2. false

Heat always flows from a body at a lower temperature to a body at a higher temperature

• 1. true

• 2. false

……………….. energy gets transeferred from one object to another because of the temperature difference .

• 1. heat

• 2. solar

• 3. mechanical

• 4. electrical

When the objects in thermal contact atttain the same temprature , they are said to be in ………… .

• 1. mechanical equilibrium

• 2. electrical equilibrium

• 3. thermal equilibrium

• 4. balanced condition

emperature is a measure of the ……… of a body

• 1. warmth

• 2. height

• 3. volume

• 4. density

As the temperature of the body increases , the kinetic energy of its molecules also increases

• 1. true

• 2. false

Heat energy is measured in …………….. .

• 1. newton

• 2. calories

• 3. degree centigrade

• 4. none of the above

The amount of heat required to increase the temprature of mole of gas by 1 kelvin is known as ……. .

• 1. molecular specific heat

• 2. molar specific heat

• 3. internal energy

• 4.non of the above

In calorimetery, …….. .

• 1. only exothermic reaction can be measured

• 2. only endothermic reaction can be measured

• 3. reaction involving changes in heat or thermal energy can be measured

• 4. the heat of a compound can be measured

Which of these statement does not describe the converstion of energy in a chemical reaction ?

• 1. Energy is neither created nor destroyed during a chemical reaction.

• 2. The energy contained in the bonds of rectant molecules always equal the energy contained in the bonds of the product molecules.

• 3. If the energy of the system increase the energyof the surrounding decrease by the exact same amount

• 4. Energy can only be transferred from one form to another.

• 5. If the energy of a system decreases, then the energy of the surroundings increases by the exact same amount.