Introduction to thermochemistry

• What is the definition of an element in thermochemistry?

  Relative atomic mass
• What is the equation to calculate moles from mass and relative atomic mass?

  Moles = Mass/RAM
• What is the definition of a compound in thermochemistry?

  Relative molecular mass
• What is the equation to calculate moles from mass and relative molecular mass?

  Moles = Mass/RMM
• What factors affect the volume of a gas?

  Temperature and pressure
• What are the conditions for Room Temperature and Pressure (RTP)?

  25°C & 1 atm
• How is density defined in thermochemistry?

  Density = Mass/Volume
• What are the units for density of gases?

  g/l or g l⁻¹
• How many centimeters are in one decimeter?

  10 cm
• How many cubic centimeters are in one cubic decimeter?

  1000 cm³
• How many liters are in one cubic decimeter?

  1 l
• What is the definition of molar volume?

  Volume of 1 mole of gas
• What is the molar volume of a gas at RTP?

  24 dm³
• What is the equation for calculating moles of gases?

  n = V / Vm
• What does 'V' represent in the equation n = V / Vm?

  Volume of gas (dm³)
• What does 'n' represent in the equation n = V / Vm?

  Number of moles (mol)
• What does 'Vm' represent in the equation n = V / Vm?

  Molar volume
• What is the relative atomic mass of nitrogen (N)?

  14.01
• How is the relative atomic mass of nitrogen gas (N₂) calculated?

  RAM[N₂] = 14 × 2 = 28