Question

CHEM 1411 Exam 1 14) Asample of gas initially at 4.00 atm was compressed from 8.DOL at co the compression, the gas pressure was atm. A) 1.00 B) 8.00 C) 16.0 D) 2.00 E) 4.00 15) A balloon originally had a volume of 4.39 L at 44°C and a pressure of 729 torr. The balloon be cooled to "Cto reduce its volume to 3.7 L at constant pressure). A)/00 B) 3 500k 2670k $29° _/mol If 3.5 g of the gas occupies 2.1 L at STP. (1 atm, 16) The molecular weight of a gas is 273 k). A) 5.5 x 10 B) 41 C) 4.6 x 10 37 E) 2.7 x 10" 17) The first person to investigate the relationship between the pressure of gas and its volume was A) Lord Kelvin B) Jacques Charles C) Amadeo Avogadro D Robert Boyle E) Joseph Louis Gay-Lussac 18) Which of the following is correctly identified? A) 1 s is endothermic B) 8+ 1 is exothermic gas liquid C) 5+g is endothermic Sci--> 993 more than one of the above are correct E) none of the above are correct 1.1.1.100.000

Answer 1

1. 4.L = 8 am 4:39 L mol 2:1 L 22.4 L/mol 224 14. P v = constant P = P, V = 4 atm x 8L 8.00 am | 15. 1 x V T : VT, 1 - 4 4 = 317K © 2676 3:71. X317% = 267k 16. At STP, n = 2.14 La mor Molecular weight = 3.5g B 21/224 mor © 37 2 3.5x224 g/mol = 37.3 g/mol 11. ® Robert Boyle 18. l s energy or heat required as endothermic (Correct gee heat is required - endothermic wrong s ->g heat is released exothermic wrong ® is correct mop 21