I need help with my homework questions please?

How much heat energy is required to raise the temperature of 5 kilograms of coal from 20掳C to 220掳C?



A. 314 J

B. 6,573 J

C. 1,314,718 J

D. 4,187,000 J





10. One degree Celsius indicates the same temperature change as



A. one degree Fahrenheit.

B. one kelvin.

C. 5/9 degree Fahrenheit.

D. 9/5 kelvin.





11. A quantity of a gas has an absolute pressure of 400 kPa and an absolute temperature of 110 degrees kelvin. When the temperature of the gas is raised to 235 degrees kelvin, what is the new pressure of the gas? (Assume that there's no change in volume.)



A. 1.702 kPa

B. 3.636 kPa

C. 510 kPa

D. 854.46 kPaI need help with my homework questions please?
try asking under the category of physics. someone maybe able to help there tooI need help with my homework questions please?
11 is D. 400x(t2/t1) = 400x(235/110) = 854.46.



for 9 you need to know the specific heat of coal.



Q=mc(delta T) m=5kg, delta T = 220-20=200. Find c in your textbook for coal and plug it in. Q is the heat by the way.



10. The answer is B. to switch from celcius to kelvin you add 273 and if you are subtracting values the 273 will just dissapear off.I need help with my homework questions please?
10 - B is right

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