Why does the thermometer stop at a certain temperature during distillation?Question 16Answera.It indicates the limit of heating has been reached and should be cooled.b.It indicates the reaction has finished and distillation should be ended.c.It indicates the boiling point of a pure compound is reached and should be collected.d.It indicates the distillation is on-going and should be continued.

In constructing a thermometer it is NECESSARY to use a substance that: Question 13 Select one: a. undergoes some change when heated or cooled b. expands linearly with rising temperature c. will not boil d. will not freeze e. expands with rising temperature

. A reaction is allowed to take place in an insulated container containing 100 mL of water. If the reaction is endothermic, what happens to the temperature of water?*2 pointsThe temperature of water goes down.The temperature of water goes up.The temperature of water does not change.

(c) The student repeats the experiment on a different day, using 25 cm 3of potassium hydroxide solution and 25 cm 3of dilute hydrochloric acid.The thermometer shows the highest temperature reached at the end of the experiment. °C 25 20(i) Complete the table by giving the missing information.Give both temperatures to the nearest 0.1 °C. (2) mean temperature at start in °C temperature at end in °C temperature rise in °C5.2

Select the two options that best complete the following sentence. While water boils, the temperature is:90°C100°Cincreasingconstant

Thermometer is to Temperature as Barometer is to: