Question

How many kilocalories of heat does the operation of a 1200 W hair dryer produce each...


How many kilocalories of heat does the operation of a 1200 W hair dryer produce each second?

How much heat in kcal must be added to 0.5kg of water at room temperature (20°C) to raise its temperature to 50°C?

How much heat in kcal is necessary to change 500 g of ice at -15°C to water at 20°C?


A cylinder of gas is at room temperature (20°C). The air conditioner breaks down, and the temperature rises to 60°C. The new pressure of the gas relative to the initial pressure (p1

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
How much does it cost to run a 1500-W hair dryer for 16 minutes each day...
How much does it cost to run a 1500-W hair dryer for 16 minutes each day for one month (30 days) at a cost of 14¢ per kWh? $ 1.68 $ 0.53 $ 2.48 $ 1.15
(a) How much heat transfer (in kcal) is required to raise the temperature of a 0.600...
(a) How much heat transfer (in kcal) is required to raise the temperature of a 0.600 kg aluminum pot containing 2.00 kg of water from 40.0°C to the boiling point and then boil away 0.850 kg of water? kcal (b) How long (in s) does this take if the rate of heat transfer is 600 W (1 watt = 1 joule/second (1 W = 1 J/s))? s
(a) How much heat transfer (in kcal) is required to raise the temperature of a 0.700...
(a) How much heat transfer (in kcal) is required to raise the temperature of a 0.700 kg aluminum pot containing 1.50 kg of water from 35.0°C to the boiling point and then boil away 0.800 kg of water? ? kcal (b) How long (in s) does this take if the rate of heat transfer is 550 W (1 watt = 1 joule/second (1 W = 1 J/s))? ? s Please explain each step thoroughly and why, I am really confused.
(a) How much heat transfer (in kcal) is required to raise the temperature of a 0.550...
(a) How much heat transfer (in kcal) is required to raise the temperature of a 0.550 kg aluminum pot containing 3.50 kg of water from 25.0°C to the boiling point and then boil away 0.650 kg of water? (b) How long (in s) does this take if the rate of heat transfer is 600 W (1 watt = 1 joule/second (1 W = 1 J/s))?
How many joules heat must be added to 2.0 kg of ice at a temperature of...
How many joules heat must be added to 2.0 kg of ice at a temperature of -30 °C to bring it to room temperature 20 °C? (Specific heat capacity of ice is 2100 J/kg °C). (Specific heat capacity of water is 4186 J/kg °C). (Latent heat of water-ice is 3.33x105 J/kg) Group of answer choices 126.52 kJ 959.44 kJ 4293.44 kJ 668.78 kJ
Consider two 35-gram ice cubes, each initially at -5°C. One is dropped into a at container...
Consider two 35-gram ice cubes, each initially at -5°C. One is dropped into a at container filled with 0.1 kg of liquid nitrogen (initially the boiling point of nitrogen); the other cube is dropped into a container filled with 1 kg of (liquid) water, initially at 5°C. Assume that no heat is lost through either container (or into the atmosphere) a) Describe what happens to each ice cube (and why) b) If (Lv)Nitrogen =48 kcal/kg, (LF)Nitrogen = 6.1 kcal/kg, and...
Consider two 35-gram ice cubes, each initially at -5°C. One is dropped into a at container...
Consider two 35-gram ice cubes, each initially at -5°C. One is dropped into a at container filled with 0.1 kg of liquid nitrogen (initially the boiling point of nitrogen); the other cube is dropped into a container filled with 1 kg of (liquid) water, initially at 5°C. Assume that no heat is lost through either container (or into the atmosphere) a) Describe what happens to each ice cube (and why) b) If (Lv)Nitrogen =48 kcal/kg, (LF)Nitrogen = 6.1 kcal/kg, and...
Heat is the Total internal energy of an object Average kinetic energy of molecules Measure of...
Heat is the Total internal energy of an object Average kinetic energy of molecules Measure of potential energy of molecules Same thing as very high temperature The specific heat of copper is 0.093 cal/g⁰C, and the specific heat of aluminum is 0.22  cal/g⁰C. The same amount of energy applied to equal masses, say, 50 g of copper and aluminum, will result in A higher temperature for copper A higher temperature for aluminum The same temperature for each metal Unknown results The...
19. How much heat is liberated (in kJ) from 2.47E+2 g of silver when it cools...
19. How much heat is liberated (in kJ) from 2.47E+2 g of silver when it cools from 8.86E+1 °C to 2.57E+1 °C? The heat capacity of silver is 0.235 J g^{-1} °C^{-1} g−1°C−1. Note, "heat liberated" implies that the change in heat is negative. Enter a positive number 20. A sample of sand initially at 2.18E+1 °C absorbs 1.386E+3 J of heat. The final temperature of the sand is 6.7E+1 °C. What is the mass (in g) of sand in...
A grey body is one whose absorptivity 1. does not vary with temperature and wavelength of...
A grey body is one whose absorptivity 1. does not vary with temperature and wavelength of the incident ray 2. is equal to its emissivity 3. varies with temperature 4. varies with wavelength of the incident ray A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal 1. potential energy. 2. kinetic energy. 3.temperature. 4. intermolecular forces of attraction. A liquid of density 1000 kg/m3...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT