Q MCT Practice Problems

Hi buddy here I have come to get Q MCT Practice Problems material to do preparation of an entrance exam, so will you plz provide me here??

[shikha]

As you are looking for Q MCT Practice Problems material to do preparation of an entrance exam, so on your demand I am providing same:

Example 1:
How much heat (in calories) is needed to raise 20 grams of water from 5 oC to 40 oC?
Q = mc(Tf—Ti)
Q = x
m = 20 grams
c = 1 cal/goC (this is the specific heat of water)
Tf = 40 oC
Ti = 5
x = (20 g) (1 cal/goC)(40 -5 0C) = 700 cal
Example 2:
How much heat (in calories) is needed to raise 140 grams of water from 20 oC to 25 oC?
Q = mc(Tf—Ti)
Q = x
m = 140 grams
c = 1 cal/goC (this is the specific heat of water)
Tf = 25 oC
Ti = 20 oC
x = (140 g) (1 cal/goC)(25-20 0) = 700 caL

Example 3:
How much heat (in calories) is needed to raise 250 grams of water from 80 oC to 87 oC?
Q = mc(Tf—Ti)
Q = x
m = 250 grams
c = 1 cal/goC (this is the specific heat of water)
Tf = 87 oC
Ti = 80 oC
x = (250 g) (1 cal/goC)(87—80 0C) = 1750 cal

Example 4:
How many calories are needed to raise 50 grams of iron from 55 oC to 200 oC? The specific
heat capacity of iron is 0.11 cal/goC.
Q = mc(Tf—Ti)
Q = x
m = 50 grams
c = 0.11 cal/goC
Tf = 200 oC
Ti = 55 oC
x = (50 g) (0.11 cal/goC)(200– 55 0C) = 797.5 cal


Q MCT Practice Problems material