17. A 7.5 g sample of calcium carbonate, CaCO3 (s), absorbs 45.5 J of heat when it is increased from 21.1 °C to 28.5 °C. Calculate the specific heat of calcium carbonate in J/(g°C) 18. Which of the following is a diprotic acid? a. nitric acid b. hydrochloric acid c. phosphoric acid d. sulfuric acid 19. How many moles of gas are there in a 45.0 L container at 25.0 °C and 500.0 mmHg? 20. The F-N-F bond angle in the NF3 molecule is approximately how many degrees? 21. Standard temperature and pressure refers to _________ torr and ___________ K. 22. A student weighing 75 kg is immersed in a bath of 400. Kg of water at 4.0 °C to try to reduce a fever. The students body temperature dropped from 40.0 °C to 37.0 °C during the process. Assuming the specific heat of the student is 3.77 J/(g°C), what is the final temperature of the water? Hint: Q lost = - Q gained Answers: 1. 119 L 2. 35.16 % and 64.84 % respectively 3. a. potassium phosphate 4. 31.8 mph 5. 6 mol C atoms 6. 107 mL 7. exothermic 8. radiant energy (light) 9. d. K2SO4
17. A 7.5 g sample of calcium carbonate, CaCO3 (s), absorbs 45.5 J of heat when it is increased from 21.1 °C to 28.5 °C. Calculate the specific heat of calcium carbonate in J/(g°C) 18. Which of the following is a diprotic acid? a. nitric acid b. hydrochloric acid c. phosphoric acid d. sulfuric acid 19. How many moles of gas are there in a 45.0 L container at 25.0 °C and 500.0 mmHg? 20. The F-N-F bond angle in the NF3 molecule is approximately how many degrees? 21. Standard temperature and pressure refers to _________ torr and ___________ K. 22. A student weighing 75 kg is immersed in a bath of 400. Kg of water at 4.0 °C to try to reduce a fever. The students body temperature dropped from 40.0 °C to 37.0 °C during the process. Assuming the specific heat of the student is 3.77 J/(g°C), what is the final temperature of the water? Hint: Q lost = - Q gained Answers: 1. 119 L 2. 35.16 % and 64.84 % respectively 3. a. potassium phosphate 4. 31.8 mph 5. 6 mol C atoms 6. 107 mL 7. exothermic 8. radiant energy (light) 9. d. K2SO4
CHEM_177_Holme_mjh216_1_Extra_Problems__chem_177_final_review.docx