Chemistry, 28.04.2021 05:00, SuperWoman9172

If 150. Grams of water must be heated from 22.0°C to 100.0 °C to make a cup of tea, how much heat must be added? What is the mass of an iron piece that cools from 50.2 °C to 27.8°C while releasing 351.7 J of heat? The specific heat capacity of iron is 0.444 J/g°C.

A 52.7 g. piece of an unknown metal is heated up 51.4 °C when given 3492 J of heat. What is the specific heat capacity of the metal?

A 25.0g piece of aluminum sits in a room and cools. It loses 4300.0 J of heat. If the initial temperature of aluminum is 125.3°C, what is the final temperature? The specific heat capacity of aluminum is 0.900 J/g°C.

How much energy is removed when 45 grams of ethanol condenses to liquid? Ethanol heat of vaporization is ΔH(vap) 38.6 kJ/mol and heat of fusion is ΔH(fus) 4.60 kj/mol. Ethanol is 46. g/mol.

How much energy is required to melt 135 grams of frozen ethanol? Ethanol heat of vaporization is ΔH(vap) 38.6 kJ/mol and heat of fusion is ΔH(fus) 4.60 kj/mol. Ethanol is 46. g/mol.

120. grams of ethanol are cooled from 90.0°C to 73.4° C. What is the heat change (in Joules)? Ethanol heat of vaporization is ΔH(vap) 38.6 kJ/mol and heat of fusion is ΔH(fus) 4.60 kj/mol. Specific heats for the three phases of ethanol are: cp (liquid) ethanol 2.46 J/g°C, cp (gas) ethanol 1.43 J/g°C, cp (solid) ethanol 2.42 J/g°C. Ethanol is 46 g/mol. The melting point of ethanol is -114.1 °C and the boiling point is 78.4 °C.

If water is cooled from 90°C to 40°C will the energy lost be a positive number or a negative number? Why?

50.0 grams of ethanol are heated from -120.°C to 25.0°C how many joules were required? Ethanol heat of vaporization is ΔH(vap) 38.6 kJ/mol and heat of fusion is ΔH(fus) 4.60 kj/mol. Specific heats for the three phases of ethanol are: cp (liquid) ethanol 2.46 J/g°C, cp (gas) ethanol 1.43 J/g°C, cp (solid) ethanol 2.42 J/g°C. Ethanol is 46. g/mol. The melting point of ethanol is -114.1 °C and the boiling point is 78.4 °C.

79.2 grams of H2O is cooled from 115 °C to -43.1°C. What is the heat change in joules?
The molar heat of vaporization of H2O is 40.8 kJ/mol. The molar heat of fusion of H2O is 6.02 kJ/mol. Cp (solid) for H2O is 2.11 J/g°C. Cp (liquid) for H2O is 4.18 J/g°C. Cp (gas) for H2O is 2.00 J/g°C. The melting point of H2O is 0.0 °C and the boiling point is 100.0 °C.

Answers: 3

Show answers

Other questions on the subject: Chemistry

Chemistry, 21.06.2019 22:30, stefaniethibodeaux

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial

Answers: 1

continue

Chemistry, 22.06.2019 07:30, genyjoannerubiera

Identify two types of chemical bonding in the source of dietary potassium

Answers: 3

continue

Chemistry, 22.06.2019 13:50, awesomegamergurl13

What happens when an atom of sulfur combines with two atoms of chlorine to produce sci2? a. each chlorine atom shares a pair of electrons with the sulfur atom. b. an electron is transferred from each chlorine atom to the sulfur atom. c. an electron is transferred from the sulfur atom to each chlorine atom. d. each chlorine atom shares all its valence electrons with the sulfur atom.

Answers: 2

continue

Chemistry, 22.06.2019 15:20, merrickrittany

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.

Answers: 1

continue

Do you know the correct answer?

If 150. Grams of water must be heated from 22.0°C to 100.0 °C to make a cup of tea, how much heat mu...