[Solved] How much mechanical work must be done to completely melt 1 gram of ice at 0°C?

McqMate

Q.	How much mechanical work must be done to completely melt 1 gram of ice at 0°C?
A.	4.2 J
B.	80 J
C.	336 J
D.	2268 J
Answer» B. 80 J
Explanation: When water at 0 degree Celsius freezes, each gram of water gives off 80 calories. The temperature of the water stays at 0 degree C until every drop has frozen. When ice at 0 degree Celsius melts, it absorbs an equal amount of heat-80 calories for each gram of ice—and its temperature remains unchanged until it has completely melted.

739

0

Do you find this helpful?

2

View all MCQs in

Discussion

No comments yet

Related MCQs

Why does ice coverfed in sawdust ct melt quickly?
An ice block with a piece of lead embedded in it floats in water. If ice melts the water level –
A piece of ice is floating in water kept in a beaker. When all the ice melts the level of water will -
Ice cubes are added to a glass of pure water and a glass of pure alcohol. The ice would be –
The snow on the mountains does NOT melt all at once when it is heated by the sum because:
When two ice cubes are pressed together, they join to form one cube. Which one of the following helps to hold them together?
When pressure is increased the melting point of ice –
If ice floating on water in a vessel melts, the water level in the vessel .
What changes will happen to a bowl of ice and water kept at exactly zero degree Celsius?
Which of the following is one of the commercial products obtained from Gelidium and Gracilaria and are used to grow microbes and in preparations of ice- creams and jellies?