Practice_Exam 1 chem 107A

Practice_Exam 1 chem 107A - 1.) In the table below, fill in...

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1.) In the table below, fill in the columns labeled : q , w , ± U , ± H, with either a positive sign (+), negative sign (–), or zero (0) to predict the quantity for the system in each process described. Process q w ± U ± H Benzene freezing at its normal freezing point Cooling a gas in a fixed volume container Adiabatic compression of a monatomic gas 10 mL of ethanol evaporates at room temperature 2.) It takes 330 Joules of energy to raise the temperature of 24.6g of benzene from 21.0°C to 28.7°C at constant pressure. What is the molar heat capacity of benzene at constant pressure? (M.W. benzene is 78.11 g/mol)
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For the remaining questions, all work must be shown to receive full credit. 3.) Suppose that the molar internal energy of a substance over a limited temperature range could be expressed as a polynomial in T as: U ( T ) = a + bT + cT 2 . Find an expression for the constant- volume molar heat capacity at a given temperature T 4.) Calculate the amount of energy required to heat two moles of argon gas in a balloon from 25° C to 100°C.
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5.) Calculate the final temperature of a 200. mL glass of water (starting at 25.0°C) after you placed
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Practice_Exam 1 chem 107A - 1.) In the table below, fill in...

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