10 Question-answer on specific heat
1. Which of the following has the highest specific heat?
(a) Copper
(b) Water
(c) Hydrogen
(d) Silver
Ans: (c)
2. The specific heat of ice at 0˚C melting into water at 0˚C is:
(a) Zero
(b) Infinity
(c) More than zero
(d) Less than zero
Ans: ( b)
3. Water is used as a coolant because of its
(a) Lower density
(b) Easy availability
(c) High specific heat
(d) Low specific heat
Ans: (c )
4. If temperature scale is changed from C to F, numerical value of specific heat will:
(a) Increases
(b) Decreases
(c) Remains same
(d) Cannot say
Ans: (b)
5. Molar specific heat of monatomic gas at constant pressure is:
(a) 5R/2
(b) 3R/2
(c) 7R/2
(d) R
Ans: (a)
6. Molar specific heat at constant volume, for non linear triatomic gas is:
(a) 3R
(b) 4R
(c) 2R
(d) R
Ans:(a)
7. If 70 cals of heat is required to raise the temp. of 2 moles of an ideal gas at constant pressure from 30˚C to 35˚C, then the amount of heat required to raise the temp. of same gas through same range at constant volume is :
(a) 50 cal
(b) 70 cal
(c) 60 cal
(d) 65 cal
Ans: (a)
8. Boiling water is changing into steam. The specific heat of boiling water is:
(a) Zero
(b) One
(c) Infinity
(d) Less than one
Ans: (c)
9. In a pressure cooker, cooking is faster because the increase of vapour pressure
(a) Increases specific heat
(b) Decreases specific heat
(c) Decreases the boiling point
(d) Increases the boiling point
Ans: (d)
10. The specific heat of an ideal gas varies with temp. T as:
(a) T
(b) T2
(c) T-1
(d) T0
Ans: (d)