1. The specific heat of water is 1 cal &°C and the specific heat of ethanol is 0
ID: 187332 • Letter: 1
Question
1. The specific heat of water is 1 cal &°C and the specific heat of ethanol is 0.6 sal/g°C. Based on this information, which of the following statements is correct? Select all that apply. 1 a. More heat is required to raise the temperature of 1 g of ethanol than to raise the temperature of 1 g of water 1°C b. Water is less resistant to temperature change than ethanol. c. Ethanol most likely has more hydrogen bonding than water. d. Water increases temperature slower than ethanol. 2. Circle and label the functional groups found on the following molecule: 1.5 pts S-H CH2 H2N C COOH cysteine Which of these functional groups will be charged in aqueous solution and what will be the charge associated with the functional group(s)7 1 pt Which of these functional groups is acting as a base in aqueous solution? 1 pt 3, 1.4 glycosidis linkages are resistant to hydrolysis, which makes thcm very resistant to degradation and decay. Which of the following polysaccharides will therefore be resistant to degradation and decay? 1.5 pts a, chitin b. glycogen c. cellulose d peptidoglycan e. starch 4. Coffee has a pi value of 5. What is the difference in.H concentration botween coffee and pure water? 1ptExplanation / Answer
1. A. It is false.
Specific heat by definition is the heat required to increase the temperature of a one gram substance by 1 degree celcius.
Thus water will require more heat.
B. False water is more resistant to temperature change.
C. False water hasmore hydrogen bonding then ethanol because it has 2 hydrogen atoms attached to oxygen while ehatnol has only 1.
D. True. Water increases temperature slower than ethanol as specific heat is more than ethanol of water.
2. Functional groups are:-.
S-H
-COOH
-NH2.
-COOH is acidic and NH2 will be basic as the former will give 1 Hydrogen ion and the later will receive 1 hydrogen atom in aqueous solution.
---e charge will be -1 on coo- and +1 on -nh3+.
3 chitin and peptidogycan has b 1,4 glycosidic bonds.therefore they will be resistant to degradation.
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