2115 7515 Masses: calorimeter alone water + calorimeter water + melted ice + calorimeter 52mks water melted ice 189 189 moles of ice melted 115°C 10,f°C 8,6°C Temperatures: initial temperature final temperature temperature change

Q: The state of a substance when the pressure and temperature are above the critical temperature and…

A: Critical temperature is the temperature above which a gas can't be liquify by applying pressure.  At…

Q: List the types of Liquid Crystals?

A: Liquid crystals are those which has properties of both liquid and crystals.

Q: Consider the heating curve for water below. Temperature (°C) 150- 100- 50- -50- 0 1 2 Heat Added…

A: The heating curve for water shows how the temperature of a given quantity of water changes as heat…

Q: How would ice be different if it were denser than water?

A: The question is based on the concept of chemical bonding. We have explain the scenario in which ice…

Q: How much heat is required to melt 23.9 g of solid diethylether (at its melting point)?

A:

Q: How much heat in kJ is required to convert 916 g of ice at-11.0°C to liquid water at 99.0°C? 706

A:

Q: Briefly describe the intermolecular forces present in tetrahydrofuran liquid that need to be broken…

A:

Q: Find the amount of heat energy needed to convert 400 grams of ice at -38°C to stearn at 160°C.

A: Given mass of water ice, m = 400gThe energy required in each process which will take place during…

Q: Compare boiling and evaporation.

A: Solution :       Boiling is the process in which a substance changes its state from a liquid state…

Q: ue

A: All the non-polar molecules have London-dispersion force of interaction. As the molecular size…

Q: 3. How much heat is needed to melt 15 g of iron?

A: Given that -  Mass of iron = 15 g  The heat of fusion of iron = 11.7 kJ/mol   And , atomic mass of…

Q: The energy needed to boil the water comes from where?

A: Water exists into three phases. These are ice, liquid water and vapors. To change one phase into…

Q: How much heat is absorbed when 10.0 grams of ice initially at -30.0ºC is heated and completely melts…

A: Since in the above process, two steps are happening 1) heating of ice from -30.0 ºC to 0 ºC  2)…

Q: How can surface tension be defined? O the tension at contact surface between two liquids O the…

A: The right answer is the tension at contact surface between two liquids.

Q: What amount of ice must be added to 540.0 g of water at 23 deg * C to cool the water to 0 deg * C…

A: Answer: This question is based on conservation of energy where heat lost by water will be equal to…

Q: How much heat is needed to melt 75.0 g of ice that is at -28.0ºC?

A: We have given that Mass of ice = m =75 grams T1 = -28°C T2 = 0°C ∆T = T2  - T1 = 0  -  (-28) = 28°C…

Q: different apparatus or instruments used to determine melting point.

A:

Q: What effect does atmospheric pressure have on boiling point?

A: A question based on vapor pressure, which is to be accomplished.

Q: What happens to the temperature after all of the ice has melted? Why?

A: When ice is heated, its temperature increases. When the ice begins to melt, the temperature remains…

Q: Which is not a characteristics of crystal solid? *     a. melting point is not sharp b. definite…

A: Answer  Which is not a characteristics of crystal solid…

Q: When water freezes, heat is Released Absorbed Sublimed Melted

A: Here's why:  This process is called as exothermic, where water releases latent heat to the…

Q: You have a 4 kg block of ice at 0 °C. a) How much heat is required to melt this block of ice? b)…

A: Given that, The mass of the ice block is m = 4 kg. The temperature is T = 0°C = 273 K. We have to…

Q: how much energy is (kcal) is required to melt 77g of ice at (0.0C) to liquid?

A: Given: The mass of ice=77 g  Tempearature=0 °C The heat of fusion for water  =333.6 J/g

Q: Fog is an example of a   A) liquid dispersed in gas B) solid dispersed in liquid C) liquid dispersed…

A: Colloids A substance is said to be in the colloidal state if it acquires a particle size ranging…

Q: Why do you think ice crystals do not all have the same shape?

A: Solution The six-fold symmetry of a snow or ice crystal is derived ultimately from the hexagonal…

Q: calculate total amount of heat needed to change 500.0g of ice at -10C into 500.0g of steam at 120.0C

A: We have to give 3 energy for this conversion First raise the Temperature from-10°C to  0°C . Then…

Q: Which of the following substances would likely have the highest melting point (melt at the highest…

A: We need to identify the compound with maximum melting temperature from the options.

Q: What happens to the temperature while there is still ice in the water? Why?

A:

Q: if the temperature of the source water 16 degree c, determine how much ice at -5 degree c will be…

A: To determine the amount of ice produced per hour by a refrigeration system, we need to calculate the…

Q: How does evaporation causes cooling

A: The conversion of a substance from its liquid phase to vapor phase below its boiling point is known…

Q: Does larger dispersion forces increase or decrease boiling and melting point

A: Larger dispersion forces, also known as London dispersion forces or van der Waals forces, typically…

Q: Using the data draw the heating curve for ice. Show temperatures where the ice first began to melt,…

A: Step 1: plot without grid lines Step 2: plot with grid lines Step 3: here as per question only data…

Q: How much heat is needed to melt 10.0 grams of ice at -10°C until it is water at 10°C?

A: Given, mass of ice = 10.0 g Initial temperature (Ti) = -10°C Final temperature (Tf) = 10°C Amount of…

Q: Which type of substance causes greater vapor pressure lowering? A. a covalent compound  B. a group…

A: Given Compound  A. a covalent compound  B. a group of nonmetals C. a metallic compound D. an ionic…

Q: why ice has less density than water?

A: The structure of water and ice can be shown in below

Q: How much heat energy is needed to melt 750.0 grams of ice. it needs to be in kj

A: We have to calculate how much heat  energy  is needed to melt 750 grams of ice.

Q: 4. Match the following phase change description to the phase change name.…

A: The objective of the question is to match the following phase change description to the phase change…