Question

36. How much heat is gained by nickel when 500 g of nickel is warmed from 22.4 to 584"C? me specific 0.444 J/KB C). 37. Given the following data of the standard enthalpy changes, find the heat required for the reaction converting solid sulfur to gaseous sulfur at 298 K and I atm pressure. heat of nickel is A) 2000J B 4000 C) 60003D) 8000 E) 100003 A)-1013k/rnol B)+618klmol C)-618 kimiol D)-223 kinol E)+223 kinnol 38. Calculate the standard heat of formation of acetaldehyde, CH3CHO(), given the following information: A) -452 kJ B)-332 kJ C)-166 kJ D) 166 k3 E) 332 kJ 39. For 20g water temperature is heated from 30c to 50'C, how much heat is absorbed? (s-4.184J/gK) A) 400J B) +1674J C)-1674 D)-400 40, Calculate the standard heat of formation, ΔΗ . of CH3OH() from ΔΗ for the combustion of CH3OH(hand the other tabulated AH values: AH CO2()-394 kJ/mol and AH? H20--286 kJ 2CH3OH() + 302(g)-→ 2CO2(g) + 41120のAH--1454 ku A)-478 kJ B-239J C)-178kJ D 239kJ E)478 k 41. Which processes are endothermic? A) Neutralization of HCI and NaOH B) The displacement reaction of Zn and HCl C) Melting of ice D) Combustion of C in air E) Condensation of water vapor 42. The pressure (p) of 2.0 L of nitrogen in a flexible container is increased to 2p, and its absolute temperature is also increased to double the original temperature. The volume is now A) 2.0 L B)4.0 L C) 8.0 L D 16.0L E) 32.0L 43. Water vaporize at 100°C, latm. The vaporization process is A) Endothermic, release heat; B) Endothermic, absorb heat; C) exothermic, release heat; D) exothermic, absorb heat; 44. Which quantum number distinguishes the different shapes of the orbitals? A)n B) C)m D)m E) any of these 45. What orbital has the quantum numbers n- 3,1-2, m-1? 46. Which of the following orbital does not exist? 47. Calculate the molarity of a solution that contains 50.0 g of NaOH in 750.0 mL of solution. 48. 350.0 ml of 2.50 M HCI are added to 400.0 ml of 5.00 M HCL. Assuming that the volumes are additive, the final B) 3p C) 3d D) 3f D) 1.25 M E) 1.67 M A)0.600 MB)0.800 M C) 1.07 M