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Science Clinic => Chemistry => Topic started by: james0929 on Jul 8, 2021

Title: How much work, in joules, is done when the pressure is suddenly released from 4.56 atm to 1.23 atm ...
Post by: james0929 on Jul 8, 2021

Question 1

How much heat is required to raise the temperature of 175 g of aluminum from 21.0 °C to 145 °C? The specific heat of aluminum is 0.903 J g^-1°C^-1.
◦ 19.6 kJ
◦ 24.0 kJ
◦ 1.27 J
◦ 22.9 kJ

Question 2

How much work, in joules, is done when the pressure is suddenly released from 4.56 atm to 1.23 atm on 45.4 g of O₂ at 44 °C?
◦ 386 ^J
◦ -477 ^J
◦ -2.74 × 10^{3 J}
◦ 2.74 × 10^{3 J}
◦ 477 ^J

Title: How much work, in joules, is done when the pressure is suddenly released from 4.56 atm to 1.23 atm ...
Post by: vboyd24 on Jul 8, 2021

Answer 1

19.6 kJ

Answer 2

-2.74 × 10^{3 J}

Title: Re: How much work, in joules, is done when the pressure is suddenly released from 4.56 atm to 1.23 a
Post by: Aseer Khan on Dec 11, 2022

Thanks!