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cricket20 [7]
3 years ago
5

C3H8+3O2 = 3CO2+4H2O what is the enthalpy combustion please show work

Chemistry
1 answer:
irakobra [83]3 years ago
5 0

Answer:

\Delta H_{comb}=2043.85kJ/mol

Explanation:

Hello there!

In this case, according to the given chemical reaction, it possible for us to set up the expression for the calculation of the enthalpy change as shown below:

\Delta H_r=-\Delta H_{comb}=3\Delta _fH_{CO_2}+4\Delta _fH_{H_2O}-\Delta _fH_{C_3H_8}-3\Delta _fH_{O_2}

Thus, given the values of the enthalpies of formation on the attached file, we obtain:-\Delta H_{comb}=3(-393.5kJ/mol)+4(-241.8kJ/mol)-(-103.85kJ/mol)-3(0kJ/mol)\\\\-\Delta H_{comb}=-2043.85kJ/mol\\\\\Delta H_{comb}=2043.85kJ/mol

Best regards!

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4 years ago
a volumetric pipette haas an uncertainty of 0.01 cm what are the lowest and highest possible volumes for a measurement of 0.20cm
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Possible lowest volume = 0.19 cm

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Given Data

uncertainty  =  0.01 cm

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Possible highest volume =  ?

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Possible highest volume = 0.20 cm - 0.01 cm

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