Question : 41) How many calories required to raise the temperature of : 1324805

 

41) How many calories are required to raise the temperature of a 150. g sample of gold from 25 °C to 175 °C?  The specific heat of gold is 0.0308 cal/g °C.

A) 4.62 cal

B) 116 cal

C) 22500 cal

D) 693 cal

E) 130 cal

42) Raising the temperature of 10.0 g of water from 10.0 °C to 20.0 °C requires 100.0 cal of energy, while raising the temperature of 10.0 g of aluminum from 10.0 °C to 20.0 °C requires 22 cal.  More calories are required to heat the water because

A) water is a liquid and aluminum is a solid at 10.0 °C.

B) ten grams of water occupies a larger volume than 10.0 g of aluminum.

C) water has a greater potential energy than aluminum.

D) water has a larger specific heat than aluminum.

E) 10.0 °C is closer to the melting point of water than to the melting point of aluminum.

43) The number of calories needed to raise the temperature of 32 g of water from 12 °C to 54 °C is

A) 384 cal.

B) 1.3 cal.

C) 1300 cal.

D) 1700 cal.

E) 0.76 cal.

44) The specific heat of copper is 0.0920 cal/g °C, and the specific heat of silver is 0.0562 cal/g °C.  If 100 cal of heat is added to one g of each metal at 25 °C, what is the expected result?

A) The copper will reach a higher temperature.

B) The silver will reach a higher temperature.

C) The two samples will reach the same temperature.

D) The copper will reach a temperature lower than 25 °C.

E) The silver will soften.

45) A burn from steam at 100 °C is expected to be more severe than a burn from boiling water at 100 °C because

A) the steam is hotter than the boiling water.

B) there is more steam than water.

C) the steam will give off a large amount of heat as it condenses.

D) you are more likely to come into contact with the steam than with the boiling water.

E) All of these answers are correct.

46) A 2.5 g sample of french fries is placed in a calorimeter with 500.0 g of water at an initial temperature of 21 °C.  After combustion of the french fries, the water has a temperature of 48 °C.  What is the caloric value (kcal/g) of the french fries?

A) 14 kcal/g

B) 11 kcal/g

C) 0.14 kcal/g

D) 4.2 kcal/g

E) 5.4 kcal/g

47) A potato contains 20 g of carbohydrate. If carbohydrate has a caloric value of 4 kcal/g, how many kcal are obtained from the carbohydrate in the potato?

A) 5 kcal

B) 20 kcal

C) 40 kcal

D) 60 kcal

E) 80 kcal

48) The dietary calorie (Cal) is equal to ( 2.6)

A) 1000 kilocalories.

B) 1000 calories.

C) 100 calories.

D) 10 calories.

E) 1 calorie.

49) A cheeseburger from a fast food restaurant contains 19 g of fat, 20 g of carbohydrate, and 28 g of protein.  How many kcal of energy does the cheeseburger contain? (The accepted caloric values for foods are 4.0 kcal/g for carbohydrate, 9 kcal/g for fat, and 4 kcal/g for protein.)  Report the answer to 2 significant figures.

A) 70. kcal

B) 360 kcal

C) 17 kcal

D) 630 kcal

E) 280 kcal

50) A serving of fish contains 50 g of protein and 4 g of fat.  If protein has a caloric value of 4.0 kcal/g and fat has 9.1 kcal/g, how many kcal are in the serving?  Report the answer to 2 significant figures.

A) 240 kcal

B) 54.0 kcal

C) 470 kcal

D) 220 kcal

E) 490 kcal

51) A slice of pizza contains 29 g of carbohydrate, 13 g of protein and an unknown amount of fat.  If the pizza contains 280 kcal, how many grams of fat are present? Report the answer to 2 significant figures.

A) 10. g

B) 12 g

C) 25 g

D) 55 g

E) 250 g

52) A diet has a total caloric intake of 1400 kcal.  The diet consists of 50.% carbohydrate, 35% protein, and 15% fat.  The number of kcal of protein in the diet is

A) 700 kcal.

B) 490 kcal.

C) 210 kcal.

D) 460 kcal.

E) 1200 kcal.

53) One cup of kidney beans contains 15 g of protein, 1 g of fat, and 42 g of carbohydrate.  How many kilocalories, to two significant figures, does this sample contain?

A) 60 kcal

B) 88 kcal

C) 230 kcal

D) 240 kcal

E) 520 kcal