Thermochemistry Worksheet

What is the heat of neutralization for NaOH + HCl --> H₂O + NaCl

• –1258.4 kJ/mole NaOH

• –502.2 kJ/mole NaOH

• –469.15 kJ/mole NaOH

• –135.5 kJ/mole NaOH

Tags

NGSS.HS-PS1-4

What is the heat of combustion per mole of hexane?

2 C₆H₁₄ + 19 O₂ --> 12 CO₂ + 14 H₂O

• –8388.8 kJ

• –4194.4 kJ

• –512.1 kJ

• –256.1 kJ

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

What is the heat of this reaction, in kilojoules per mole Ni(s)? 2 HBr(aq) + Ni(s) → NiBr2(aq) + H2(g)

• -569.2

• -175.8

• -139.5

• 290.2

Tags

NGSS.HS-PS1-4

What is the heat of this reaction, in kilojoules per mole calcium?

Ca(s) + 2 HCl (aq) --> CaCl₂ + H₂

• –980.0

• –887.7

• –703.1

• –610.8

Tags

NGSS.HS-PS1-4

What is the standard heat of the reaction that took place, in kJ, per mole Ca(OH)2?

Ca(OH)₂ + 2HCl --> CaCl₂ + 2 H₂O

• -65.2 kJ

• -110.3 kJ

• -75.5 kJ

• 195.4 kH

Tags

NGSS.HS-PS1-4

• - 159

• +159l

• +40

• -40

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

• -802 kJ/mol

• -459 kJ/mol

• -353 kJ/mol

• -19 kJ/mol

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

When chemical bonds are broken, energy is —

• absorbed

• created

• destroyed

• released

Tags

NGSS.HS-PS1-4

When bonds are formed, energy is —

• A. absorbed

• B. created

• C. destroyed

• D. released

Tags

NGSS.HS-PS1-4

Which change of phase is exothermic?

• A. H2S(g) → H2S(l)

• B. CO2(s) → CO2(l)

• C. H2O(s) → H2O(g)

• D. NH3(l) → NH3(g)