QUESTION5 True or False. Na0H and HCI are both contact hazards and PPE must be w

Question

QUESTION5 True or False. Na0H and HCI are both contact hazards and PPE must be worn at all times during lab. True O False QUESTION 6 In a calorimetry experiment, it was determined that the heat change of the surroundings, gsurroudings, was 4482J. What is the heat change of the system, qsystem? 4482) O-4482J 2241 O-2241 J QUESTION 7 In this investigation, we make the assumption that the specific heat of the aqueous solution is the same as that of water. What is the specific heat of liquid water, written with correct units? 2.027) O 2.027]/(g"q 2.015°C 4.184Jt' QUESTION 8 If the value of heat, q, is positive when the temperature of a sample of water changes, then the temperature of water was decreased. O the temperature of water was increased. it depends on whether mass and specific heatvalues are positive or negative O none of the above

Explanation / Answer

5. True

Both NaOH and HCl are strong base and acid respectively. They affect the skin and cause burns if protection is not used.

6. -4482J

The heat in surrounding is released if heat is absorbed in the system and vice versa.

7. 4.184 J/g°C

8. The temperature of water is Increased.

q= mc *dT. Here dT is the difference between final and initial temperature. Only if the final temperature is greater, q would be positive.

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