1sthr W3 ASSESSMENT

How do you calculate Enthalpy of a reaction?

• ΔH = ΔH_products - ΔH_reactants

• ΔT = q / mC

• ΔG = ΔH -TΔS

• E = mc²

Tags

NGSS.HS-PS1-4

Which of the following represent the enthalpy change of atomization?

• O₂(g) → 2 O(g)

• Mg(s) → Mg(g)

• Mg(s) + Cl₂(g) → MgCl₂(s)

• Ca(g) → Ca²⁺(g) + 2 e

which of the following enthalpy changes represent the enthalpy change of formation?

• Mg(s) + Cl₂(g) → MgCl₂(s)

• Mg²⁺(g) + 2 Cl ^-(g) → MgCl₂(aq)

• O2(g) → 2 O(g)

• 2Mg (s) + O₂(g) → 2MgO(S)

which of the following represent the enthalpy change of hydration?

• Mg(s) → Mg²⁺(g)

• Mg(s) → Mg²⁺(g) + 2 e

• Cl₂(g) + (aq)→ 2Cl(aq)

• Mg²⁺(g) → Mg²⁺(aq)

Which of the following represent enthalpy change of solution?

• Cl₂(g) ---> 2Cl^-(aq) .

• Mg²⁺(g) ---> Mg²⁺(aq)

• MgCl₂(s) ---> Mg²⁺(aq) + 2Cl^-(aq) .

• Mg²⁺(g) + 2Cl^-(g) ---> Mg²⁺(aq) + 2Cl^-(aq)

1/2 O₂(g) → O(g)

This equation represents.

• Enthalpy of atomization

• enthalpy of sublimation

• enthalpy of dissociation

• enthalpy of formation

Name the device used to measure the changes in thermal energy.

• calorie

• specific heat

• calorimeter

• styrofoam cup

A metal cube at temperature of 10°C immersed in a liquid at temperature of 70°C.
What is the temperature of the metal cube when thermal equilibrium is achieved between the cube and the liquid?

• Between 10°C and 70°C
• More than 70°C
• Less than 10°C
• Same as the room temperature

Tags

NGSS.HS-PS3-4

The amount of energy required to raise the temperature 1ºC for every kilogram is called____?

• Thermal Energy
• Specific Heat
• Temperature
• Kinetic Energy

Tags

NGSS.MS-PS1-4

A metal cube at temperature of 70°C is immersed in water at temperature of 20°C. The metal _______ heat while the water __________ heat.

• gains, loses

• loses, gains

Tags

NGSS.HS-PS3-4