when standard molar enthalpy is less than zero, the reaction is endothermic

In the van der Waals equation, the parameter corrects for which assumption of the ideal gas law?i. No intermolecular forces exist.ii. Collisions with container walls are perfectly elastic.iii. Gas molecules undergo random thermal motion.iv. Gas molecules occupy no volume.

For ideal and non-ideal gases, which one of the following is correct? 

The internal energy change of an ideal gas depends not only on its temperature, but also its volume or pressure.

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

For a reversible adiabatic ideal gas compression process, the temperature would decrease.

Which of the following is TRUE if ΔEsys = – 337 J?

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).