I asked this question before starting my classes to get some knowledge. please help me knowledge about this question . thanks in advance for help

I asked this question before starting my classes to get some knowledge. please help me knowledge about this question . thanks in advance for help

When 23.6 g of calcium chloride were dissolved in 300 mL of water in a calorimeter, the temperature of the water rose from 25.0 degree celsius to 38.7 degree celsius. What is the heat energy change...

How much heat energy is required to completely change 25 grams of ice at 0 degree Celsius to water and raise the temperature to body temperature (37 degree Celsius)?

Tell whether the temperature of the part will ever reach or exceed 135F. Use discriminant of a quadratic equation to decide. Part 2: If machine is in operation for 90 minutes before turning off, how...

Sodium metal is sometimes used as a cooling agent in heat exchange units because of it's relatively high molar heat capacity of 28.2 J/mol C. what is the specific heat of sodium in J/g C?

When 25mL of 1.0M H2SO4 is added to 50mL of 1.0M NaOH at 25c in a calorimeter, the temperature of the aqueous solution increases to 33.9C. Assuming that the specific heat of the solution is 4.18J/g...

in a thermal pot, there is a layer of vacuum in the outer wall, an inner pot lid and an outer pot lid. Please help me to clarify these questions: 1....

Tell whether the temperature of the part will ever reach or exceed 135F. Use discriminant of a quadratic equation to decide. Part 2: If machine is in operation for 90 minutes before turning off, how...

Explain how heat may or may not have affected ionic and covalent compounds differently.

When 25.0 mL of 1.0 M H2SO4 is added to 50.0mL of 1.0M of NaOH at 25.0 degrees C in a calorimeter, the temperature of the aqueous solution increases to 33.9 degrees C. Assuming that the specific heat...

If a person burns energy at the rate of 150 Watts, how much cool water (at 50o) is needed each hour to keep the person cool by evaporation (assume no heat is lost by conduction or radiation ? The...

State Change: Liquid to Solid. Name: Freezing. Energy: Less. Particle Motion: Slower. Heat: Released. State Change: Gas to Liquid. State Change: Gas to Solid. State...

a. Calculate the amount of heat needed to warm 24.6 kg of water from a room temperature of 20.0°C to 60.0°C for use in a dishwasher. b. If the water heater has an efficiency of 61%, how much...

You place a very hot piece of aluminum (T=120 degrees C, c=900 J/(kg*degrees C) into a 500ml beaker of water that is already at an initial temperature of 90.0 degrees C. The mass of this piece of...

4 grams CaCl2 is dissolved in 40 grams of water at 1 degree C. Find the final temperature of the water.

C2H6 + O2→CO2 + H2O. The heat from this reaction vaporized 20 grams of water. What mass of C2H6 was burned?

1.20 grams of Mg is burned producing MgO. The heat from the reaction is used to warm 500 grams water at 5 degrees Celsius. Find the final temperature of the water.

Write the heat of formation equation for: A) NaCl B) NaOH C) C2H6 D) NO2

If a 0.06247 kg ice cube initially at 0.00 C is allowed to melt in a Styrofoam cup holding 0.497 kg of water at 10.0 C , what is the total entropy change for this process?

Δ2HF + PbCl2→2HCl(g) + PbF2 ΔHf = +90KJ. Find the ΔHf of PbF2