Results for "•Heat"

Heating and Applications of Forces

Unit 5 Energy & Heat Transfer

Specific Heat Capacity Flashcards

Heating & Cooling Curves Practice

latent heat + phase diagrams

Lecture 17 - Heat Transfer

Part II. Multiple choice, continued (3 points each). Name:__________________ Please circle your answer. There is only one correct answer to each question. 43. The F-N-F bond angle in the NF3 molecule is slightly less than ___________. A) 90˚ B) 109.5 ˚ C) 120˚ D) 180˚ 44. The angles between sp2 orbitals are _____________. A) 90˚ B) 109.5˚ C) 120˚ D) 180˚ 45. The blending of one s atomic orbital and two p atomic orbitals produces __________. A) three sp hybrid orbitals B) three sp2 hybrid orbitals C) three sp3 hybrid orbitals D) two sp3 hybrid orbitals 46. The π bond in ethylene, CH2CH2, results from the overlap of ___________. A) sp3 hybrid orbitals B) s atomic orbitals C) sp2 hybrid orbitals D) p atomic orbitals 47. The amount of gas that occupies 60.82 L at 31˚ C and 367 mm Hg is _________ mol. A) 1.18 B) 0.850 C) 894 D) 11.6 48. The specific heat of lead is 0.13 J/g-K. How much heat (in J) is required to raise the temperature of 15 g of lead from 22 ˚C to 37 ˚C? A) 7.8 B) 1.9 C) 19 D) 29 49. Which one of the following is a weak acid? A) HNO3 B) HI C) HF D) HClO4 50. Which combination will produce a precipitate? A) NH4OH (aq) and HCl (aq) B) AgNO3 (aq) and Ca(C2H3O2)2 (aq) C) NaCl(aq) and HC2H3O2 (aq) D) NaOH (aq) and Fe(NO3)2 (aq) 51. The density of chlorine (Cl2) gas at 25 ˚C and 450 torr is _______ g/L. A) 20 B) 4.9 C) 1.7 D) 0.86

Part II. Multiple choice, continued (3 points each). Name:__________________ Please circle your answer. There is only one correct answer to each question. 22. ∆E for a system that releases 12.4 J of heat and does 4.2 J of work on the surroundings is ____________ J. A) 16.6 B) 12.4 C) –8.2 D) –16.6 23. ∆H for an endothermic process is _________ while ∆H for an exothermic process is __________. A) zero, positive B) positive, negative C) negative, zero D) negative, positive 24. The value of ∆H˚ for the reaction below is –283 kJ. Calculate the heat (kJ) released to the surroundings when 12.0 g of CO reacts completely. CO (g) + O2 (g) à CO2 (g) A) 121 B) 660 C) 283 D) 212 25. Given the following reactions N2 (g) + 2O2 (g) à 2NO2 (g) ∆H = 66.4 kJ 2NO (g) + O2 (g) à 2NO2 (g) ∆H = -114.2 kJ the enthalpy of the reaction of nitrogen to produce nitric oxide N2 (g) + O2 (g) à 2NO (g) is __________ kJ. A) 180.6 B) –47.8 C) 47.8 D) –180.6 26. Given the data in the table below, ∆H˚ for the reaction 2CO (g) + O2 (g) à 2CO2 (g) is __________ kJ. Substance ∆Hf˚ (kJ/mol) CO (g) -110.5 CO2 (g) -393.5 CaCO3 (s) -1207.1 A) –677.0 B) 283.3 C) –283.0 D) –566.0

Thermal Energy and Heat Vocab Words

physics heat energy

Bio 111 Exam 4 (Heather Birdsong)

Heat pump exam

PreQ Pysics - Specific heat capacity

Topic 5 - Solar Energy, Atmospheric Heating and Global Temperature

Heating and Cooling Systems Flashcards

Weather and Heat Transfer

Heat Transfer Final

Electric Baseboard Heat

Superficial Cold and Heat

temperature and principles of heat exchange - exam 4