Chemistry

How many joules are required to raise the temperature of 450mL of water from 30 °C to 100 °C?

The specific heat of copper metal is 0.385 J/ g- K. How many KJ of heat needed to raise the temperature of 1.1 kg block of copper from 27.5 C to 50 C?

If 200 J of heats is added to 25 g of iron at a temperature of 15 °C, what will be the final temperature?

A hot piece of iron with a mass of 75g and a temperature of 200 °C, is dropped into 250g of cool water at a temperature of 18° C. What is the final temperature of the water and the iron?

When 1.00g of sodium hydroxide is dissolved in 100 g of water in an insulated container the temperature rises from 20.0° C to 22.66° C. Calculate the enthalpy for the solution. State by assumptions made.

Calculate change in enthalpy when 100 mL of 1.0 mole/dm NaOH is added to 100 mole/dm HCl in an insulated container the temperature rises from 21.0° C to 34.6 °C.

How much heat will release when 6.44g of sulfur reacts with excess O2 according to the following equation?
2 S + 3 O2 > 2 S 3 H = -791.4 KJ

How much heat will be absorbed when 38.2g of bromine reacts with excess H2 according to the following equation?
H2 + Br2 > 2 HBr H= 72.80 KJ

An experiment was carried was carried out to determine the amount of energy released in a low fat chocolate bar with a the mass 50.0g. the complete combustion of a 10.0 g of the bar raised the temperature of 500.0g of water from 19.0° C to 86.5 °C. calculate the energy value ( KJ )of the chocolate bar.

How much heat will be transferred when 5.81g of graphite reacts with excess hydrogen according to the following reaction? Is this reaction endothermic or exothermic?

  1. 👍 0
  2. 👎 0
  3. 👁 550
  1. you are dreaming thinking you can dump homework here.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    Approximately how many joules of heat are needed to raise the temperature of a 4.0-gram sample of water to 8.0C? that is all of the information that was provided

  2. chemistry

    How many joules of heat energy are required to raise the temperature of 20 grams of water by 50°C?

  3. Chemistry

    Approximately how many joules of heat are needed to raise the temperature of a 4.0-gram sample of water to 8.0C?

  4. Chemistry

    The heat capacity of lead is 0.13 J/g•°C. How many joules of heat would be required to raise the temperature of 15 g of lead from 22°C to 37°C?

  1. chem

    How much energy in joules does it take to raise the temperature of 255g of water by 12.5 C? pls help!

  2. Chemistry

    Imagine that your water heater has broken, but you want to take a bath. You fill your bathtub with 25kg of room-temperature water (about 25C). You figure that you can boil water on the stove and pour it into the bath to raise the

  3. chemistry

    * A 50 gram sample of an unknown metal warms from 18 to 58 after absorbing 800 joules of energy. what is the specific heat of the metal? *copper has a specific heat of 0.387 j/g degree celsius. what is the mass of a piece of

  4. chemistry

    A) How much energy is released when 25.0 g of steam condense to liquid H2O at 100°C? B) If it takes 1215J of heat to raise the temperature of water 11.C, how much does the water weigh, in grams? C) How many joules of heat does it

  1. Physics Hear

    1) Peter is heating water on the stove to boil eggs for a picnic. How much heat is required to raise the temperature of his 10.0-kg vat of water from 20.0℃ to 100.0℃? Formula>> Q=mTcp 2)Under the spreading chestnut tree of the

  2. Physics

    The oven draws 1100W of power, and you have determined that it heats with an efficiency of 51%. Using this information, determine the time t it would take to bring 240mL of water from 25C to 100C . Note that 4.2 J of energy is

  3. Physics

    How long would it take a kettle with a 1kW heating element to heat 1 litre of water? Watts = Joules / second • Mass of 1 litre of water = 1kg • 1 kW = 1 k Joule / second or 1000 joules/ second • 1g of water needs 4.184J to

  4. Chemistry

    How many joules of heat are required to raise the temperature of 550 g of water from 12°C to 18°C

You can view more similar questions or ask a new question.