Hi there,
I need help with these two chemistry questions. Please show your work. Thank you.
Q1) A 9.82 g sample of 2-ethylhexanal (formula C8H16O), is mixed with 29.39 atm of O2 in a 1.96 L combustion chamber at 333 °C. The combustion reaction to CO2 and H2O is initiated and the vessel is cooled back to 333 °C. Report all answers to two decimal places in standard notation (i.e. 1.23 atm).
A) What is PCO2 the combustion chamber assuming the reaction goes to completion? Assume all water is water vapour and that the volume of the system does not change. Answer in atm.
Last answer: 1.947 atm (wrong)
B) What is PO2 (in atm) in the combustion chamber after the reaction goes to completion?
Q2) A block of an alloy of mass 40.0 g and at a temperature of 14.51 °C is placed in a calorimeter containing 47.0 g of dichlorobenzene at 88.81 °C. If the final temperature of the alloy and dichlorobenzene is 60.56 °C, calculate the specific heat (in J/g/K) of the metal. The specific heat of dichlorobenzene is 1.13 J/g/K. Express your answer to three significant figures in scientific notation.
Last answer: 1.52 J/g/K. (Wrong)
Hi there,
I need help with these two chemistry questions. Please show your work. Thank you.
Q1) A 9.82 g sample of 2-ethylhexanal (formula C8H16O), is mixed with 29.39 atm of O2 in a 1.96 L combustion chamber at 333 °C. The combustion reaction to CO2 and H2O is initiated and the vessel is cooled back to 333 °C. Report all answers to two decimal places in standard notation (i.e. 1.23 atm).
A) What is PCO2 the combustion chamber assuming the reaction goes to completion? Assume all water is water vapour and that the volume of the system does not change. Answer in atm.
Last answer: 1.947 atm (wrong)
B) What is PO2 (in atm) in the combustion chamber after the reaction goes to completion?
Q2) A block of an alloy of mass 40.0 g and at a temperature of 14.51 °C is placed in a calorimeter containing 47.0 g of dichlorobenzene at 88.81 °C. If the final temperature of the alloy and dichlorobenzene is 60.56 °C, calculate the specific heat (in J/g/K) of the metal. The specific heat of dichlorobenzene is 1.13 J/g/K. Express your answer to three significant figures in scientific notation.
Last answer: 1.52 J/g/K. (Wrong)
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