Carol loves setting fires. She reports that she feels tension right before the fire and does not do it for any other purpose than to relieve the tension. She has depression and anxiety, and a substance use disorder. Which of the following represents what is unusual about the above description?

You take 295.5 g of a solid at 30.0°C and let it melt in 425 g of water. The water temperature decreases from 85.1°C to 30.0°C. Calculate the heat of fusion of this solid.

Consider the following numbered processes: 1. A –> 2B 2. B –> C + D 3. E –> 2D ∆H for the process A –> 2C + E is

A1 (Complete this on your Free Response paper) Consider the reaction:               C2H5OH(l) + 3O2(g) –> 2CO2(g) + 3H2O(l);                ∆H = –1.37 x 103 kJ   a) What type of reaction is this? b)  Is this reaction exothermic or endothermic?  Justify your answer.  c) How would the ∆H change if 3H2O(g) was produced instead of 3H2O(l)? d)  If you react 4.5 g of ethanol, how much heat would be involved?  Show your work for full credit.  

Name the artery indicated. (Smaller single vessel arising from aorta)

When a hydrogen electron makes a transition from n = 3 to n = 1, which of the following statements is true? I. Energy is emitted. II. Energy is absorbed. III. The electron loses energy. IV. The electron gains energy. V. The electron cannot make this transition.

Which of the following does not have a standard enthalpy of formation equal to zero at 25°C and 1.0 atm?

Given:               Cu2O(s) + O2(g) –> 2CuO(s) ∆H° = –144 kJ Cu2O(s) –> Cu(s) + CuO(s) ∆H° = +11 kJ Calculate the standard enthalpy of formation of CuO(s).

Consider the following specific heats of metals. Metal Specific Heat Zinc 0.387 J/(g°C) Magnesium 1.02 J/(g°C) Iron 0.450 J/(g°C) Silver 0.237 J/(g°C) Lead 0.127 J/(g°C) If the same amount of heat is added to 25.0 g of each of the metals, which are all at the same initial temperature, which metal will have the highest temperature?

An element with the electron configuration [Xe] 6s24f145d7 would belong to which class on the periodic table?