✔ 最佳答案
1. What will happen if Ice is put into water of 0 Degree Celsius? Will the ice melts or the water turns into ice? Why?
It needs to determine the mass of ice and water, Since E = mc△T
m is needed for calculating the Energy absorbed and released to deduce the change of water and ice.
2. My exercise book says that water is a poor conductor and therefore
we need to stir the water when we are heating it to find its specific
heat capacity. What does it mean?
It means to stir thhe water rapidly, so that the heat energy can deposit in the water evenly , in order to let the thermometer to detect the temperature change.
3. When we are heating a solid to find out its sapecific heat capacity,
why the accuracy of the experiment can be improved by filling the soace
between the heater and solid as well as the space between the
thermometer and solid with vaseline or oil?
Reasons: To fill in the space left in the experiement, so that it can reduce the heat loss to surroundings, in order to increase the accuracy.
4. Why polystyrene cup can reduce te heat loss? Is it related to its specific heat capacity?
Since polystyrene is a poor heat conducting material, therefore heat energy is hardly conducted through the cup, and it is difficult for heat to go to the air, to reduce heat loss to surroundings.
It's not related to its specific capacity.
2010-03-16 21:38:06 補充：
For question 3, why oil can reduce the heat loss?
Since oil can fully divide the apparatus and the air surrounded apart.
It reduces the heat loss to surroundings.
