Enthalpy Stoichiometry

• -0.443 kJ

• -4.43 kJ

• -44.3 kJ

• -44 kJ

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

Using the first 2 equations

what is the enthalpy change for the third equation in kJ/mol? (the state of the I2 product in equation 3 should be gas (g); otherwise it won't work)

• -78

• -46

• +46

• +78

Tags

NGSS.HS-PS1-4

Using the enthalpies of formation below what the heat of this reaction in kJ?

[H₂O = -286 kJ/mol ; CuCl₂ = -206 kJ/mol; CuCl₂.2H₂O = -808 kJ/mol]

• -1586

• +30

• -110

• -30

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

The enthalpy change of the second equation is ......... kJ?

• -66

• -33

• +33

• +66

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

The sand in desert is considered ..... system

• closed

• open

• isolated

• no correct asnwer

• -726.5

• -441

• -1202.5

• -60.5

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

The combustion of 1.3 g of glucose (molar mass is 180 g/mol) causes a temperature change of 24.3^oC in a calorimeter of water . What is the mass of the water?
(The standard enthalpy of combustion of glucose is -2816 KJ/mol)

• 2.0 x 10²g

• 0.20 g

• 520 g

• 28 g

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4