Year 10 Chemistry Enthalpy

What is the atomic number?

• Number of protons (and neutrons)

• Number of protons (and electrons)

• Number of electrons (and neutrons)

• Number of neutrons (and electrons)

What is the mass number?

• Number of protons and neutrons

• Number of protons and electrons

• Number of neutrons and electrons

• Number of electrons and neutrons

What is the mole based on?

• Number of atoms in 1g of Carbon

• Number of atoms in 12g of Carbon

• Number of atoms in 6g of Carbon

• Number of atoms in 10g of Carbon

What does ∆H represent?

• Change in temperature

• Change in velocity

• Change in (heat) energy

• Change in time

What do exothermic reactions do?

• Change color

• Remain neutral

• Give out energy

• Absorb energy

What is the symbol for change in energy in a reaction?

• ∆t

• ∆T

• ∆H

• ∆V

What is the specific heat capacity of water?

• 4.18 kJ kg-1 ̊C-1

• 5.27 kJ kg-1 ̊C-1

• 3.18 kJ kg-1 ̊C-1

• 2.09 kJ kg-1 ̊C-1

What is the formula for calculating enthalpy change?

• ∆H = mt ∆C

• ∆H = cm ∆T

• ∆H = mc ∆V

• ∆H = mc ∆T

What is the enthalpy change if the temperature increased from 20°C to 40°C for a solution made with magnesium nitrate and 100㎤ of water?

• 8.36 kJ mol-1

• 6.36 kJ mol-1

• 4.18 kJ mol-1

• 10.45 kJ mol-1

What is the enthalpy change if the temperature increased from 24.2°C to 37.6°C for a solution made with sodium nitrate and 50㎤ of water?

• 9.27 kJ mol-1

• 3.78 kJ mol-1

• 5.92 kJ mol-1

• 2.801 kJ mol-1