A substance can absorb heat energy by the process of________________
Conduction
Radiation
Convection
All of these
The food in a refrigerator is cooled by__________________
Vaporization of the refrigerating fluid.
Condensation of the refrigerating fluid.
The ice in your nearby freezer.
Liquidation of the refrigerating fluid
___________________is a process of transformation directly from solid phase to the gaseous phase without passing through an liquid phase.
Condensation.
Deposition
Sublimation
Vaporization
What is the heat absorbed by 200 ml of water at 20oC from your body at ( 37oC ) when you drink water?
3400 cal
4000cal
14212cal
4000J
To melt 50 grams of 00C ice requires______________of heat
80 calories
25 calories
50 calories
4000 calories
12.9 gram of an unknown metal at 26.5oC is placed in a cup containing 50.0 grams of water at 88.6oC. The water cools down and the metal warms up until thermal equilibrium is achieved at 87.1oC. Assuming all the heat lost by the water is gained by the metal and that the cup is perfectly insulated, determine the specific heat capacity of all the unknown metal. Sp. heat of water = 4.18 J/g/oC
2.49 J/g/oC
0.40J/g/oC
0.39J/g/oC
2.56J/g/oC
A 70Kg person whose body temperature is 37oC consumes an entire 0.355 liters can of a soft drink (which is mostly water) at 12oC. Calculate the temperature change in a person when they drink a cold soda.
36.848oC
35.678oC
28.456oC
27.654oC
A substance registers a temperature change from 200C to 400C. This corresponds to an incremental change of _____________
200F
20K
400F
40K
What quantity of heat in kilo cal is required to raise the temperature of 450 grams of water from 15°C to 85°C? The specific heat capacity of water is 4.18 J/g/°C.
31500
31.5
131.67
13167
Specific heat depends upon___________________
Nature of the substance
Initial temperature
Final temperature of the substance
Mass of the substance