Question

Q1) solve part A,B,C and D

A)Magnesium carbonate thermally decomposes to magnesium oxide and carbon dioxide gas: MgCO3(s) → MgO(s) + CO2(g)

Determine the volume of carbon dioxide in liters that would form if 4.22 g of magnesium carbonate decomposes completely at 355oC and 1.05 atm.

B) A 6.00 L vessel contains 10.5 g of O2, 2.12 g of CO2 and 1.12 g of He. Determine the partial pressure in atm of each gas and the total pressure in atm in the vessel at 25.1oC.

C) 61.4 mol percent N2, 26.4 mol percent O2, and 12.2 mol percent H2 are present in a 1.00 L container. How many moles of H2 are present at 18.8oC if the total pressure in the vessel is 1.01 atm.

D) Calculate the enthalpy change of converting 1.50 mol liquid nitrogen at 51 K to nitrogen gas at 311 K. The molar heat capacities of liquid nitrogen and nitrogen gas are 56.2 J/mol·K and 29.1 J/mol·K respectively. The boiling point of nitrogen is 77 K and ΔHvap = 5.6 kJ/mol.

Answer 1