Author: Anonymous

**NOTE: questions 22-24 are about pre-exercise feeding of GRAIN and relate to each other** If a horse will be ridden at low- to moderate-intensities for 8 hours, explain how feeding a large meal of grain 2 hours before exercise could impact the horse’s performance. 

True/False:  A benefit to adding vegetable oil to the equine diet is that it will lubricate the gut, preventing feed from getting stuck and causing impaction colic.

True/False:  The endotoxins produced by endophyte-infected tall fescue forage negatively affect progesterone in the mare.

Your region is experiencing a terrible drought and hay is hard to find. Which of the following feeds is NOT a suitable high fiber alternative to forage?

When visually appraising a hay, which of these factors would be the least accurate for gauging stage of growth/maturity?

You have been provided with the label from the commercial concentrate “Jersey Sure” below. What is the concentration of vitamin E in this concentrate on a DM basis?  Enter your numerical answer in the box below (no unit of measure is required — it is assumed to be IU/kg).

(**Show work on separate sheet of paper along with final answer.  Also type final answer in the provided box below the question here as well.) Diethyl ether has a ΔHvap of 29.1 kJ/mol and a vapor pressure of 3.91 atm at 76.0°C. What is its vapor pressure at 26.0°C? (7 pts.)

Which of the following unit cells has a packing efficiency of 1 (atoms)?  

For the solution described below, choose the best energy diagram that represents the solution. When sodium chloride dissolves in water the enthalpy of solution (ΔHsoln) is equal to +4 kJ.  The lattice energy (ΔHlat) for NaCl is -778 kJ and the enthalpy of solvent (ΔHsolv)for water is 285.82 kJ/mol.  

(**Show work on separate sheet of paper along with final answer.  Also type final answer in the provided box below the question here as well.) Calculate the amount of energy (in kJ) required for a 132-g sample of benzene (C6H6, M = 78.115 g/mol) at 55.2 °C to drop to 3.0 °C? *The normal freezing point for benzene is 5.85 °C and boiling point is 79.85 °C. Physical data associated with benzene is provided below, but all of the data may not need to be used. (7 pts.) Cs, solid = 1.51 J/g·°C                     Cs, liquid = 1.73 J/g·°C              Cs, gas = 1.06 J/g·°C ΔHfus = 9.80 kJ/mol                      ΔHvap = 33.9 kJ/mol