# Cal

1,416 results

### Integrated Physics and Chemistry

The specific heat capacity of copper is 0.09 cal/g°C. How much energy is needed to flow into a 10-gram sample to change its temperature from 20°C to 21°C? A)0.009 cal B)0.09 cal C)0.9 cal D)9 cal

### math

80 cal/g x 5 g 400g/cal or 400 cal/g not sure can any one help Neither. 80 cal/g x 5g = 400 cal. The unit g cancels to leave calories. x2+2x-15

### Chemistry/Physics

How much heat is required to raise the temperature of 100 g of lead 20 degrees C? The specific heat of lead is 0.0305 cal/g K. A) 51 cal B) 61 cal C) 71 cal D) 81 cal

### Physics

A 150 gram golden (specific heat 0.03 cal/gram^0 C) spoon at 20^0C is placed in a cup of tea at 100^0C. The amount of heat which the spoon absorbs from the tea which is necessary to reach spoon's tempature 47^0C is a)360.4 Cal b)121.5 Cal c)78.24 Cal d)15.08 Cal e)157.5 Cal

### Science

A 50 gram ice cube is cooled to -10oC in the freezer. How many calories of heat are required to heat it until it becomes liquid water at 20oC? (The specific heat of ice is 0.5 cal/goC.) Answer A) 1250 cal. B) 4000 cal. C) 5000 cal. D) 5250 cal. Can someone please help me solve...

### physics

A 50 gram ice cube is cooled to -10oC in the freezer. How many calories of heat are required to heat it until it becomes liquid water at 20oC? (The specific heat of ice is 0.5 cal/goC.) Answer A) 1250 cal. B) 4000 cal. C) 5000 cal. D) 5250 cal. Can someone please help me solve...

### Chemistry

How much heat is released when 10 g of steam at 100°C is cooled to 10 g of liquid water at 100°C? I am working on a practice test and the answer is not in the back of the book. Can some one help me. 1. 10 cal 2. 5400 cal 3. 800 cal 4. 6200 cal

### chemistry

How many calories are required to heat 25.0 g of platinum from 24.5 °C to 75°C (specific heat of platinum = 0.139 J/gK)? 1. 47 cal 2. 42 cal 3. 48 cal 4. 20 cal 5. 80 cal Thank you.

### Physics

A substance has the following properties; Boiling Point = 140 °C, Freezing Point = -10 °C, specific heat as a gas, liquid and solid, 0.3 cal/g.C°, 1.8 cal/g.C° and 0.8 cal/g.C° respectively. Heat of fusion =100 cal/g and heat of vaporization = 480 cal/g. How much heat ...

### Chemistry

Which of the following is the correct unit for specific heat? degree C*** Cal cal/g cal/(g*deg C)

### Science -- Check my Answer Plz

How much heat (calories) must be applied to a 100 mL beaker filled with boiling water in order to vaporize the water? ** A) 540 cal ** B) 540 * 10^4 cal C) 800 cal D) 8000 cal Is A correct? or cud it be B.?

### Chemistry

Person consumes 1995 Calories/day. How many is this in kJ My answer/work: 1995 x 1000 cal/1 Cal x 4.184J/1 cal x 1 kj/1000J= 8347.08kj Let me know if I did anything wrong and give me a hint on what I can do to fix it thank you :)

### Physics

How much heat is required to melt 50 g of mercury at -45 degrees celsius to 425 degrees celsius. (melting point=-38.degree-c, specific heat=0.03325 cal/g-degree c for solid mercury, .2988 cal/g-c degree c for liquid mercury and .2486 cal/g-c degree for gaseous mercury, heat of...

### Physics

How much heat is required to melt 50 g of mercury at -45 degrees celsius to 425 degrees celsius. (melting point=-38.degree-c, specific heat=0.03325 cal/g-degree c for solid mercury, .2988 cal/g-c degree c for liquid mercury and .2486 cal/g-c degree for gaseous mercury, heat of...

### Physics

How much heat is required to melt 50 g of mercury at -45 degrees celsius to 425 degrees celsius. (melting point=-38.degree-c, specific heat=0.03325 cal/g-degree c for solid mercury, .2988 cal/g-c degree c for liquid mercury and .2486 cal/g-c degree for gaseous mercury, heat of...

### Chem

How do you convert? (a) 4.50 Cal to calories (b) 600.0 Cal to kilojoules (c) 1.000 J to calories (d) 50.0 Cal to joules

### science

an aluminium container of mass 100g contains 200 g of ice at -20'c heat is added to the system at the rate of 100 cal/sec. what will be the final tmperature of the mixture after 4 min? given:specific heat of ice:0.5 cal/gm'c ,latent heat of fusion:80 cal/gm and specific heat ...

### Physics

A 200g block of copper at 90o C is dropped into 400g of water at 27o C contained in a 300g glass beaker at 27o C. What is the final equilibrium temperature of the mixture? cCu = 0.0924 cal/g°C cglass = 0.2 cal/g°C cwater = 1 cal/g°C

### Chemistry

What quantity of heat is necessary to convert 50.0 g of ice at 0.0 C into steam 100,0 C? The heat of fusion is 80.0 cal/g, the heat of vaporization is 540 cal/g, and the specific heat of water is 1.00 cal/gC.

### math

if a person weighing 150 pounds runs in place for 15 minutes and the reg cal burned is 650 cal /hr Since 15 minutes is 1/4 of an hour, multiply 650 by 1/4. 162.5 cal/hr

### Chemistry

If you have the q cal of a reaction, then obviously you can convert to q chem by negating your q cal. But what if you need to get to q rxn (q of the reaction)? Also, my textbook is claiming that the q rxn = -(q sol + q cal). How does that figure into this?

### Chemistry

Calculate S (measure of total entropy) for the following reaction at 25C and 1atm, and tell whether the entropy is increasing or decreasing. C3H8(g)+5O2(g)-> 3CO2(g)+4H2O(g) S of C3H8=64.5 cal/(mol*K) S of O2= 49 cal/(mol*K) S of CO2= 51.1 cal/(mol*K) S of H2O= 45.1 cal/(...

### Chemistry Help!!!!

Calculate S (measure of total entropy) for the following reaction at 25C and 1atm, and tell whether the entropy is increasing or decreasing. C3H8(g)+5O2(g)-> 3CO2(g)+4H2O(g) S of C3H8=64.5 cal/(mol*K) S of O2= 49 cal/(mol*K) S of CO2= 51.1 cal/(mol*K) S of H2O= 45.1 cal/(...

### Chemistry

Calculate S (measure of total entropy) for the following reaction at 25C and 1atm, and tell whether the entropy is increasing or decreasing. C3H8(g)+5O2(g)-> 3CO2(g)+4H2O(g) S of C3H8=64.5 cal/(mol*K) S of O2= 49 cal/(mol*K) S of CO2= 51.1 cal/(mol*K) S of H2O= 45.1 cal/(...

### Physics

What mass of ice at 0 oC must you add to 0.5 kg of water at 22 oC to bring the final temperature of the water to 5 oC? (cice = cvapor = 0.5 cliq , cliq = 1 cal/(g oC), hfusion = 80 cal/g, hvaporiztion = 540 cal/g) A. 5.9 B.71 C 100 D106 E1.7

### college (Physical Science/Physics)

I am having difficulty with this equation. I have been working with it for several weeks! Please Help. the equation is this: solve for Lf Lf=[(CwMw+CsMs+CcMc)(To-Tf)//Mi-CwTf values Cw=1.00; Mw=143.4; Cs=0.11; Ms=30.0; Cc=0.22; Mc=57.7;To=23.9; Tf=14.2;Mi=16.7 I keep comming ...

### Calculus

Jill burns 100 calories per hour while sleep and 300 calories per hour while walking and 200 calories per hour at work. If in a typical day Jill spends 7 hours sleeping, 2 hours walking and 6 hours working, what is her average calories burned for those hours? 166.67 cal/hr 200...

### physics

how much heat is required to vaporize 7 grams of ice initially at 0 degrees celsius when the latent fusion of ice is 80 cal/g, the vaporization of water is 540 cal/g, and the specific heat of water is 1 cal/(g x C)?

### PHYSICS!!

A Mountain bar has a mass of 6.7×10−2 kg and a calorie rating of 270 cal. What speed would this candy bar have if its kinetic energy were equal to its metabolic energy? [Note: The nutritional calorie, 1 Cal , is equivalent to 1000 calories (1000 Cal ) as defined in ...

### Science -- Explaination on Heat Capacity?

I need some1 to explain heat capacity to me because the way my lesson is teaching it is EXTREMELY confusing!! A simple explanation would be nice! Dumb it down 4 a 7th grader!!!!! If you could use the following question in the explanation, that would be great because this is y ...

### math

How many hours of jogging at 5 1/2mi/h would be needed for a 200 pound person to lose 5 pounds and it takes 3500 cal for one pound 740 cal/h for jogging 5 1/2 mi/h Please post your answer, and we'll be glad to critique it. 750x3500 740x3500=2590 No, not right. If it takes 3500...

### Biotech

The dynamic method is used to measure kLa in a fermentor operated at 30degC. Data for dissolved-oxygen concentration as a function of time during the re-oxygenation step is given (table with time (s) and CAL (% air saturation)). The equilibrium concentration of oxygen in the ...

### Chemistry

Calculate the heat released when 10.0 g of water at 25.0°C cools to ice at 0.0°C. The specific heat of water is 1.00 cal/(g × °C); the heat of fusion is 80.0 cal/g; and the heat of vaporization is 540.0 cal/g.

### chemistry

A pound of body fat stores an amount of chemical energy equivalent to 3500 Cal. When sleeping, the average adult burns or expends about 0.45 Cal/h for every pound of body weight. How many Calories would a 135 lb person burn during 7 hours of sleep? (Note that 1 Cal = 1 kcal.)

### science

A pound of body fat stores an amount of chemical energy equivalent to 3500 Cal. When sleeping, the average adult burns or expends about 0.45 Cal/h for every pound of body weight. How many Calories would a 126 lb person burn during 7 hours of sleep? (Note that 1 Cal = 1 kcal.)

### physics

A pound of body fat stores an amount of chemical energy equivalent to 3500 Cal. When sleeping, the average adult burns or expends about 0.45 Cal/h for every pound of body weight. How many Calories would a 196 lb person burn during 7 hours of sleep? (Note that 1 Cal = 1 kcal.)

### science

A pound of body fat stores an amount of chemical energy equivalent to 3500 Cal. When sleeping, the average adult burns or expends about 0.45 Cal/h for every pound of body weight. How many Calories would a 170 lb person burn during 10 hours of sleep? (Note that 1 Cal = 1 kcal.)

### PHYSICAL SCIENCE

A pound of body fat stores an amount of chemical energy equivalent to 3500 Cal. When sleeping, the average adult burns or expends about 0.45 Cal/h for every pound of body weight. How many Calories would a 179 lb person burn during 10 hours of sleep? (Note that 1 Cal = 1 kcal.)

### Chemistry

What is the entropy change of liquid glycol (in cal K-1 mol-1 ) when it freezes at -25 ˚C?the heat of fusion of glycol is 2688 cal mol-1 , and the specific heats of liquid and solid glycol are 33.8 and 20.1 cal K-1 mol-1 , respectively.

### Physics

A 100-g aluminum calorimeter contains a mixture of 40 g of ice and 200 g of water at equilibrium. A copper cylinder of mass 300 g is heated to 350 C and then dropped into the calorimeter. What is the final temperature of the calorimeter and its contents if no heat is lost to ...

### Physcial Science

Hey There, I have 4 questions that I am totally stumped on... Can anyone help? A 200-gram chunk of stuff rises in temperature by 3oC when you input 1200 calories of heat. What is its specific heat capacity? Answers A)50 cal/goC. B) 2 cal/goC. C) 5 cal/goC. D) 0.02 cal/goC. You...

### Physcial Science

Hey There, I have 4 questions that I am totally stumped on... Can anyone help? A 200-gram chunk of stuff rises in temperature by 3oC when you input 1200 calories of heat. What is its specific heat capacity? Answers A)50 cal/goC. B) 2 cal/goC. C) 5 cal/goC. D) 0.02 cal/goC. You...

### Physcial Science

Hey There, I have 4 questions that I am totally stumped on... Can anyone help? A 200-gram chunk of stuff rises in temperature by 3oC when you input 1200 calories of heat. What is its specific heat capacity? Answers A)50 cal/goC. B) 2 cal/goC. C) 5 cal/goC. D) 0.02 cal/goC. You...

### Math

Where is it that tells that cal/g = cal ? And are we talking about calories and grams? What can I say? I am a right brained person :-) Thanks

### Enviromental Science

How many cal and K cal are required to evaporate one gram of water at 100 degrees Celcius?

### chemistry

If the heat of fusion for ethyl alcohol is 26 cal/g, how many grams must freeze to release 780 cal?

### physics

How much energy is required to melt 0.1 kg of water (hfusion = 80 cal/g, hvaporiztion = 540 cal/g) at 0oC.

### CHEMISTRY

The grams of protein in 1 cup of soup that has 110 Cal{\rm Cal} with 7 g{\rm g} of fat and 9 g{\rm g} of carbohydrate. Express your answer using one significant figure.

### Math

chart ingredients proteins------------4 gram per cal carb----------------4 gram per cal fat------------------9 gram per cal A banana has 27 grams of carb. it has a total of 121 calories. How many of its calories come from sources other than carbs?

### chemistry

Use the thermochemical equations: 1/2 H2(g)+1/2 I2(g) ...............> HI(g) delta H = -1.1 k cal 1/2 H2(g).......> H2 (g) delta H = -104.2 k cal 1/2 I2 (g)..............> I (g) delta H = +18.1 k cal To present for the formation of hydrogen iodide gas from gaseous ...

### chem/ health

if it takes alcohol 185 cal to evaporate and water 552 cal to evaporate, which is better to use to reduce a fever?

### physical science

A sample of silver at 20.0 °C is heated to 100 °C when 1000 cal is added. What is the mass of the silver? (csilver = 0.056 cal/deg-gm)

### chemistry

How much heat (in cal) is necessary to heat 27.0 mL of octane (s= 0.526 cal/g ®C ; d = o.703 g/mL ) from 50.6 ®C to 67.2 ®C? I understand the Delta T is = 16.6®C But I don’t know what d stands for (density) or how to apply to the formula.

### Chemistry

convert 175f to c convert 325f to k covnert 575 cal to J canvert 23 Cal to J

### Chemistry

Daily diet consists of 120 g of carbohydrates, 65 g of fat, and 43 g of protein. How many calories does this diet provide daily? My work/answers: 120 g x 4 g/calories of carbs = 48 g/cal 65 g x 9 g/calories of fats= 585 g/cal 43 g x 4 g/calories of protiens = 172 g/cal Total: ...

### Chemistry

Ice has negative caloric count. How much energy, in each of the following units, does your body lose from melting 175g of ice? Express your answers in J, kJ, cal, Cal

### Moorpark

Ice has negative caloric content. How much energy, in each of the following units, does your body lose from melting 175g of ice? Express your answer in J, kJ, cal, Cal

### chemistry

A calorimeter consists of an interior metal bomb (container) surrounded by 2.22 kg of water all contained within an insulated exterior wall. A sample of propane, C3H8, weighing 6.89g, was burned in the calorimeter with excess oxygen. As a result of the combustion, the interior...

### PHYSICS!!

It is 5.0 km from your home to the Physics lab and your car is out of gas. You could run that distance at 10 km/h, which uses up energy at the rate of 700 W; or you could walk it leisurely at 3.0 km/h, which uses energy at 300 W. (a) Calculate how much energy both choices ...

### PHYSICS!!!!

It is 5.0 km from your home to the Physics lab and your car is out of gas. You could run that distance at 10 km/h, which uses up energy at the rate of 700 W; or you could walk it leisurely at 3.0 km/h, which uses energy at 300 W. (a) Calculate how much energy both choices ...

### Physics

Please help! Suppose that a 400 gram copper object (specific heat 0.092 cal/g/degrees Celsius) receives 900 cal. of heat. What is the temperature change? Explain your reasoning. Thanks

### math

write an expression using n as the variable for this problem. each day julia rides her bike to and from work. she lives 9 blocks from work and burns 13 cal. per block. how many cal. does she burn in n days

### Chemistry

If 18oo cal:of heat is added to a system while system does work equivalent to 2800 cal:by expanding against its surroundings. What is the value of deltaE for the system?

### Math

Sal and Cal both work for the same company making $55,000 each in annual salary. Sal deposits 5% of her salary to her 401k plan and the company matches 25 cents for each dollar contributed to the 401k up to the 5%. Cal deposits nothing into his 401k. If they are both ...

### Physics

Please help! Suppose that a 400 gram copper object (specific heat 0.092 cal/g/degrees Celsius) receives 900 cal. of heat. What is the temperature change? Explain your reasoning. Do not use algebra Thanks!

### Chemistry

A 5 oz carrot is burned in a calorimeter containing 10.0 lb of water. The water heats up from 20.5 oC to 22.8 oC. How many Calories are in the 5 oz carrot? Round to correct sig. fig. 1 Cal = 1000 cal.

### science

calculate the heat f iodine vapours & solid are 0.031 & 0.055 cal/g respectively. If heat of sublimation f iodine is 24 cal/ g at 200°C .wat is its value at 260°C??

### Chem/Bio/Nutrition

Why is the experimental Cal/g value usually less than the Cal/g value calculated from the Information on the nutrition label?

### physics

A 920 g empty iron kettle is put on a stove. How much heat in joules must it absorb to raise its temperature form 15.0° C to 93.0° C? (The specific heat for iron is 113 cal/kg · °C.)(1 cal = 4.184 J)

### Chemistry

A compound is characterized by the following constants: Heat of fusion = 75 cal/g Heat of vaporization = 20 cal/g The heat of deposition for the same compound is

### univ. physics

A heat pump has a coefficient of performance of 4.5. If the heat pump absorbs 46.1 cal of heat from the cold outdoors in each cycle, what is the amount of heat expelled to the warm indoors? (in cal)

### physics

A heat pump has a coefficient of performance of 4.5. If the heat pump absorbs 46.1 cal of heat from the cold outdoors in each cycle, what is the amount of heat expelled to the warm indoors? (in cal) tried everything but got nothing.

### chemistry

If 125 cal of heat is applied to a 60.0-g piece of copper at 23.0∘C , what will the final temperature be? The specific heat of copper is 0.0920 cal/(g⋅∘C) .

### Heat Production (Animal Phy)

Assume that an animal consumes 200 ml of O2 in the course of metabolizing 250 mg of food. Determine the probable kind of food the animal has metabolized. How much heat has been produced? I determined the food type by dividing 200 by 250 to get 0.8 ml O2/mg, which is close to ...

### chemistry

The specific heat of ethanol is 0.59 cal/g Celsius If one adds 450 cal of heat to 37 g of ethanol at 20 celsius what would the final temp be

### Math

Cal had 6 comic books. After he gave 1 comic book to each of his cousins, he had none left. How many cousins does Cal have?

### math

ice in a refrigerator melts at rate of 3 kg per hour. the temperature outside is 27°c. find the minimum power output of a motor used to drive the refrigerator,which just prevents ice from melting. latent heat of ice = 80 cal/g,J=4.2 joule/cal, 1 h.p = 746 w

### pre cal

does anyone take pre-cal online ?

### Chemistry

Ethylene glycol has a specific heat of 0.578 cal/(g×°C). If 23.2 g of ethylene glycol absorbs 75.6 cal of heat energy, what will the temperature increase be?

### chemistry

Assume that 64.0 cal of heat is applied to a 14 g sample of sulfur at 16°C. What is the final temperature of the sample if the specific heat of sulfur is 0.175 cal/(g·°C)?

### Chemistry

Assume that 64.0 cal of heat is applied to a 14 g sample of sulfur at 16°C. What is the final temperature of the sample if the specific heat of sulfur is 0.175 cal/(g·°C)?

### sscc

Assume that 41.0 cal of heat is applied to a 30. g sample of sulfur at 16°C. What is the final temperature of the sample if the specific heat of sulfur is 0.175 cal/(g·°C)?

### physics

A 68 student consumes 2500 Cal each day and stays the same weight. One day, he eats 3500 Cal and, wanting to keep from gaining weight, decides to "work off" the excess by jumping up and down. With each jump, he accelerates to a speed of 3.4 before leaving the ground.

### chemistry

A mass of 7 kg of water is raised from 8 degrees C to the boiling point 100 degrees C. How much heat is required? The specific heat of water is 1000 cal/kg · degrees C. Answer in units of cal

### chem

A mass of 7 kg of water is raised from 8 degrees C to the boiling point 100 degrees C. How much heat is required? The specific heat of water is 1000 cal/kg · degrees C. Answer in units of cal I got 644000, is that right?

### Science -- Check my Answer Plz (again)

A beaker contains 50.0 mL of water at 90.0°C. How many calories must be added to raise the temperature of the water to its boiling point (100°C)? A) 50.0 cal B) 1.00*10^3 C) 100.0 cal D) 5.00*10^2 I think the answer is B, but i also think im wrong...

### physical science

If 500 kg of water at 200 degrees F is poured into a lake that is 50.0 degrees F, how much heat is added to the lake? Joules added = mass x specific heat water x delta T. mass = 500 kg Look up specific heat water in cal/kg delt T is 200. Solve for Joules added. Isn't the ...

### Chemistry

Assume that 57.0 cal of heat is applied to a 28g sample of sulfur at 27 degrees C. What is the final temperature of the sample if the specific heat of sulfur is 0.175 cal/g degrees C?

### physics

A piece of metal of mass 112g is heated 100 degree C.,and dropped into a copper calorimeter of mass 40g containing 200g of water at 16 derreC. Neglecting the heat loss, the specific het of the meatal is nearly,if the equilibrium temperature reached is 24.1degree C, OPTIONS : 1...

### chemistry

how do I convert kcal/mol to kJ/mol? how do I convert cal/mol to kJ/mol? So the question really is converting calories to joules.. 1 cal= 4.184 joules

### Chemistry

Imagine that a hypothetical life form is discovered on our moon and transported to Earth. On a hot day, this life form begins to sweat, and it is determined that the heat of vaporization of its sweat is 155 cal/g. The scientist observing the extraterrestrial life form also ...

### chemistry

I'm not sure how to solve this: If 125 cal of heat is applied to a 60.0-g piece of copper at 20.0∘C , what will the final temperature be? The specific heat of copper is 0.0920 cal/(g⋅∘C). Express the final temperature numerically in degrees Celsius Thanks

### Math

If a person cross-country skis for 35 minutes, how many calories will be burned? 700 calories are burned in 1 hour. I do not know how to set it up? set up a ratio cal/35 = 700/60 cross-multiply and solve for 'cal' you should get appr. 408

### Chemistry

Determine ∆G° (in kcal) for the reaction CCl4(ℓ) + H2(g) HCl(g) + CHCl3(ℓ) at 25 °C under standard conditions. The following information is available: At 25 °C C(graphite) + 2Cl2(g) CCl4(ℓ) ∆S° = -56.23 cal K-1 C(graphite) + Cl2(g) + H2(g) ...

### physics

A 27 g ice cube at −25◦C is dropped into a container of water at 0◦C. How much water freezes onto the ice? The specific heat of ice is 0.5 cal/g · ◦ C and its heat of fusion of is 80 cal/g. Answer in units of g.

### su

A pound of body fat stores an amount of chemical energy equivalent to 3500 Cal (remember, 1 Calorie = 1 kilocalorie). When sleeping, the average adult burns or expends about 0.45 Cal/h for every pound of body weight. How long, in days, would the person have to sleep ...

### Chemistry

Expressing amounts of energy in different energy units is necessary to solve many chemistry problems. For practice, complete the following table. FILL IN THE BLANKS PLEASE. The Joule (J) is the SI unit of energy. 1 calorie (cal) = 4.184 J J cal kJ 695 ___ ___ ___ 132 ___ ___ ...

### chemistry

On a brisk walk, a person burns about 325 Cal/h. A pound of body fat stores an amount of chemical energy equivalent to 3500 Cal. If the brisk walk were done at 2.1 mi/h, how far would the student have to walk to burn off the pound of body fat?

### Chemistry

A chemist mixes 100ml of H2O at 30 degrees Celsius and 56.0g of CaOin a calorimeter. The following reaction occurs" CaO(s) +H2O(l)--->Ca(OH)2(s) ΔH= -16.0 kcal/mol The heat capacity Ca(OH)2(s) is 19.2 cal/mol*degreeCelsius and the heat of vaporization of water is 540 ...