"When 0.985g sample of C7H SN 3o 6 is burned in a bomb calorimeter, the temperature increases from 20.7° C to 27.2° C. The heat capacity of the calorimter is 496 J/C, and it contains 661 grams of water. Find the following rounding all answers to the nearest whole number Find the q H2O in joules Find the g cal in joules Find the q pnin joules Find the A for the nxn in kl/mol (sign does matter)

Calculate the energy required to heat 157.0 g of graphite from 4.3 °C to 13.8 °C. Assume the specific heat capacity of - 1 - 1 graphite under these conditions is 0.710 J•g K. Round your answer to 2 significant digits. alo Ar Dlo

Given the following thermochemical equations P4(s) + 6C12(g) 4PCI3(g) AH = -2439 kJ/mol 4PCI5(g) → P4(s) + 10CI 2(g) AH = 3438 kJ/mol find the AH for the reaction below, PCI5(g) → PC|3(g) + Cl2(g) O A) +249.8 kJ/mol O B) +999 kJ/mol O C) -999 kJ/mol O D) -249.8 kJ/mol

Natural gas burns in air to form carbon dioxide and water, releasing heat. CH4(g) + O2(g) → CO2(g) + H2O(g)                                    ΔHorxn = -802.3 kJ What minimum mass of CH4 is required to heat 23g of water by 32oC? (Assume 100% heating efficiency.) Natural gas burns in air to form carbon dioxide and water, releasing heat. CH4(g) + O2(g) → CO2(g) + H2O(g)                                    ΔHorxn = -802.3 kJ What minimum mass of CH4 is required to heat 23g of water by 32oC? (Assume 100% heating efficiency.) 62 g 22.5 g 7.80 mg 61 mg 118 mg