Thermochemistry - Quiz 1

Boiler is considered

• Open system

• Closed system

• Isolated system

Cup of tea is considered

• Open system

• Closed system

• Isolated system

Pepsi can is considered

• Open system

• Closed system

• Isolated system

Most of the physical and chemical change are accompanying with a change in

• color

• mass

• energy

• density

In the chemical reaction , a beaker in which the chemical reaction occur represents ...

• the system

• the system boundary

• the surrounding

WHICH of the following represent an application if conservation of energy ? ...

• the total energy of an isolated system which contains ice remains the same even when the ice is turned into water

• Hydrogen gas and oxgyen gas react togther to form water with releasing thermal energy

• In Photosynthesis process , Light energy converts into chemical energy .

car fuel tank is considered ............. system

• open

• closed

• isolated

• equilibrium

50 kj equivalent to

• 50000 j

• 0.005 j

• 500 j

• 5 j

the average kinetic energy of H2O molecule decrease by conversion of a certain mass of ........

• Liquid water it's temperature is 64 C To a liquid water it's temperature 25 C

• Liquid water it's temperature is 100 C To a water vapour it's temperature 100 C

• ice it's temperature is -73 C TO ice it's temperature -3 C

• ice it's temperature is 0 C TO Water it's temperature 0 C

if the temperature of substance is doubled as well as it's mass , the specefic heat will be

• constant

• decreased to quarter

• increased to double

• increase 4 times