Calculating Δ H f θ from combustion data

1 / 2

# Calculating Δ H f θ from combustion data - PowerPoint PPT Presentation

Calculating Δ H f θ from combustion data. Find Δ H f θ of ethyne C 2 H 2 given the following combustion data Δ H c θ C 2 H 2 (g) = -1300 kJmol -1 C (s) = -394 kJmol -1 H 2 (g) = -286 kJmol -1

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

## PowerPoint Slideshow about 'Calculating Δ H f θ from combustion data' - raziya

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Calculating ΔHfθ from combustion data

• Find ΔHfθ of ethyne C2H2 given the following combustion data
• ΔHcθ C2H2(g) = -1300 kJmol-1
• C (s) = -394 kJmol-1
• H2(g) = -286 kJmol-1
• Find ΔHfθ of propan-1-ol C3H7OH given the following combustion data
• ΔHcθ C3H7OH (l) = -2010 kJmol-1
• C (s) = -394 kJmol-1
• H2(g) = -286 kJmol-1

Ans: +226kJmol-1

Ans: -316kJmol-1

Calculating ΔHrθ from formation data

• Calculate ΔHrθ for the following reaction:
• CH2=CH2(g) + H2(g) CH3CH3(g)
• ΔHfθethene = +52kJmol-1
• ΔHfθethane = -85kJmol-1
• Calculate ΔHrθ for the reaction:
• CaCO3(s) CaO(s) + CO2(g)
• ΔHfθCaCO3= -1207kJmol-1
• CaO = -635kJmol-1
• CO2 = -394kJmol-1

Ans: -137kJmol-1

Ans: +178kJmol-1