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In a reversible adiabatic compression of an ideal gas, which of the following statements are correct? i) The gas temperature increasesii) The gas temperature decreasesiii) The internal energy increasesiv) The internal energy decreases

The differential work expression, dw = –Pext dV, applies to compression processes because Vfinal < Vinitial. For expansion processes, however, it is written as dw = Pext dV.

Which reaction has ΔrH°m equal to ΔfH°m (H2O, l, 298.15 K)?

Based on the first law of thermodynamics, which of the following statement is correct?

During a process, the internal energy of a system decreases by 200 J, while the system releases 100 J of heat to the surroundings. Which of the following descriptions is correct?

At 273 K and standard pressure (pθ), during the melting of ice into water, which of the following relationships is correct?

For CO(g) + 1/2 O2(g) → CO2(g), the enthalpy change is ΔH. Which statement is incorrect?

A 29.7 g copper block, initially at 82.0°C, is added to a sample of water, initially at 21.1°C. The final temperature of the mixture was 32.9 °C. Calculate the mass of water ? The specific heat of copper is 0.385 J/(g°C).

Give the number of valence electrons for sulfur.

Choose the element that has the highest electron affinity: He, C, F, Al, and K.