Question

3. What do you notice about the state of the ice as you shake and knead the ice cream mixture?

4. What do you notice about the state of the ingredients
after shaking and kneading?
5. Was your hand cold after shaking the bag? Explain what took place (in terms of heat Transfer)

Answer 1

Explanation for the above mentioned state:

• Shaking and kneading of ice cream mixture releases energy and because of this ice may melt further and hence salt is added to maintain the required temperature.
• With kneading of ingredients the size of air bubbles decreases, distributing the fat molecules evenly and giving a more smoother texture to ice cream.
• Whereas with shaking of ingredients, it helps to move the warm mixture from inside to outside so that freezing can occur evenly.
• Yes the hands get very cold while shaking the bag as transfer of energy take place and it can also lead to numbness for some time.