Calculate the heat change in calories for freezing 20 gg of water at 0 ∘C. Express your answer as a positive value using two significant figures and include the appropriate units.

Q: Calculate the amount of calories required to raise the temperature of 21.8 g of water from 8.5°C to…

A: Given,The mass of water =21.8 g.Initial temoerature of water = 8.5 oCFinal temperature of water =…

Q: A 24.817 gram sample of water with specific heat of 4.184 J/g0C changes temperature from 25.00 0C to…

A: Given :-  Mass of water = m = 24.817 g Initial temperature of water = Ti = 25.00 °C  Final…

Q: Ethanol, C2H6O, reacts in the body via the following equation: C2H6O(aq)+3O2(g) →2CO2(g)+3H2O(l)+327…

A: From given balanced equation there is demand to find amount of ethanol when 1390 KJ of heat is…

Q: If 10.0 g of cream at 15.4°C are added to an insulated cup containing 100.0g of coffee at  72.2°C.…

A: Specific heat of the substances is same as water i.e 4.18 j/gc

Q: Calculate the amount of heat needed to boil 12.0 g of acetic acid (HCH3CO₂), beginning from a…

A: The objective of the question is to calculate the total heat required.

Q: How much heat is required to warm 2.30 LL of water from 20.0 ∘C∘C to 100.0 ∘C∘C? (Assume a density…

A: Given problem :How much heat is required to warm 2.30 L of water from 20.0 oC to 100.0 oC ? (Assume…

Q: A 135 g sample of gold originally at 40.8 °C was heated with 161 calories. The specific heat of gold…

A:

Q: How much energy (in J) is lost when a sample of iron with a mass of  28.3g cools from 64.0 ∘C to…

A: Mass of Iron sample, M  = 28.3 g  Change in temperature, ∆t = (64.0 ∘C -27.0 ∘C) = 37.0 ∘C The…

Q: In the laboratory a student uses a "coffee cup" calorimeter to determine the specific heat of a…

A: Given data : Mass of copper(mc) = 18.9 gms Temperature of copper(Tc) = 99.38°C Mass of water(mw) =…

Q: Using heat of fusion or vaporization to find the heat needed to melt or boil a substance] Calculate…

A: Solution :    The heat of vaporization is the amount of energy required to convert a liquid…

Q: In the laboratory a student uses a "coffee cup" calorimeter to determine the specific heat of a…

A:

Q: Assuming that Coca-Cola has the same specific heat as water [4.18 J/(g⋅∘C)], calculate the amount of…

A:

Q: What is the kinetic energy of a 23.1 g ball moving at 39.1 m/s? Report your answer with the correct…

A: Notes:Kinetic energy is given by: KE=21​mv2 Where:KE = kinetic energy (Joules)m = mass (kg)v =…

Q: How much energy is evolved as heat when 4.7 L of water at 0 °C solidifies to ice? (The heat of…

A: We know that  Density of water = 1 g/mL Mass of water = density of water x volume Mass of water = 1…

Q: The specific heat of liquid mercury is 0.140 J g C-1. How many joules of heat are needed to raise…

A: Given, Specific heat capacity of liquid Mercury (Cp) = 0.140 J/g.°C Mass of Mercury (m) = 16.94 g…

Q: Part A How much heat must be absorbed by a 13.0 g sample of water to raise its temperature from 13.0…

A:

Q: Calculate the amount of heat needed to boil 99.5 g of acetic acid (HCH,CO,), beginning from a…

A:

Q: what amount of heat in J is required to raise the tempereture of 326.7 g of lead by 13.1 degrees…

A: Given : Mass of lead = 326.7g Change in temperature = 13.10C Specific heat = 0.128J/g degrees…

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.