Part B : Communication (28) 18. Explain the difference between temperature and heat. What determines the direction of heat transfer from one

Hi could someone help me with these practise test questions?! Thank you.!!!!!!

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Part B : Communication (28)18. Explain the difference between temperature and heat. What determines the direction of heat transfer from onesubstance/object to another? (3)19. Describe J.J. Thomson's cathode ray tube experiment and explain how the experiment helped add to ourunderstanding of the atom. (4)a Coursenero/costudy20. a. What is Markovnikov's rule? Explain how it applies to the following reaction, and use it to predict theproducts. (3)H2CCH, + HCIsharedb. Explain why Markovnikov's rule would not apply if you propene was reacting with Cl instead of HCI. (2)