# Chemistry

posted by .

1) When hydrazine (N2H4) is burned in a 253-g brick container, the temperature of the brick increases by 5.13 degrees Celsius. Calculate the quantity of heat released in this raection. The specific heat of brick is 0.840 J/(gC).

2) A sample of coal is burned in a bomb calorimeter with a heat capacity of 4.62 KJ/C. The temperature in the calorimeter rises from 20.22 to 25.25 degrees celsius. Calculate the heat of the combustion reaction (qrxn) in KJ.

How do I solve these problems?

• Chemistry -

## Similar Questions

1. ### Physics

Hi maybe someone can help me out, since my teacher isn't available today and this is due tonight :D. Find the heat that flows in 1.0 s through a lead brick 17 cm long if the temperature difference between the ends of the brick is 9.5 …
2. ### Chemistry

A 2.25 g sample of hydrazine, N2H4, is burned in a bomb calorimeter that contains 6,402.45 g of H2O, and the temperature increases from 25.00° C to 26.17° C. The heat capacity of the calorimeter is 3.64 kJ/° C. Calculate Delta E …
3. ### Chemistry Help!!!

1) When hydrazine (N2H4) is burned in a 253-g brick container, the temperature of the brick increases by 5.13 degrees Celsius. Calculate the quantity of heat released in this raection. The specific heat of brick is 0.840 J/(gC). 2) …
4. ### Chemistry

1) When hydrazine (N2H4) is burned in a 253-g brick container, the temperature of the brick increases by 5.13 degrees Celsius. Calculate the quantity of heat released in this raection. The specific heat of brick is 0.840 J/(gC). 2) …
5. ### chemistry

When hydrazine (N2H4) is burned in a 259-g brick container, the temperature of the brick increases by 5.13 C. Calculate the quantity of heat released in this reaction. The specific heat of the brick is .840 J/(g C)
6. ### Physics

Find the heat that flows in 1 s through a lead brick 18 cm long if the temperature difference between the ends of the brick is 6.8° C. The cross-sectional area of the brick is 14 cm2.
7. ### Engineering science

A brick with a mass of 6kg is dropped vertically from a certain height.it takes 4,5 seconds for the brick to reach the ground.determine the ff.the height from which the brick is dropped and potential energy of the brick
8. ### math

A brick making company manufactures bricks with the same height and width. the volume of each brick is 108 cubic inches and the base area of each brick is 36 square inches. If the length of a brick is denoted as x and the height and …
9. ### SCIENCE

A BRICK WITH MASS OF 6 KG IS DROPPED VERTICALLY FROM A CERTAIN HEIGHT. IT TAKES 4.5 SECONDED FOR THE BRICK TO REACH THE GROUND DETERMINE THE FF. THE HEIGHT FROM WHICH THE BRICK IS DROPPED THE SPEED OF WHICH THE BRICK THE GROUND IT …
10. ### Physics

A brick that weighs 23 kg is laying on a table. The brick is retained. From the brick, a thread is connected via a castor to a weight with the mass of 19 kg. With how much force do the thread effect the hanging weight if you release …

More Similar Questions