### Material Science - Thermal Properties

1. Find the wrong statement: Specific heat
of a material ______________.

(a) Constant for a material

(b) Heat
capacity per unit mass

(c) Extrinsic property

(d) Has units as
J/kg-K.

2. Heat capacity has units as

(a) J/kg.K

(b) J/mol.K

(c) J.ohm/sec.K²

(d)
W/m.K

3. Units for thermal conductivity

(a) J/kg.K

(b) J/mol.K

(c) J.ohm/sec.K²

(d)
W/m.K

4. Lorentz constant has units as

(a) J/kg.K

(b) J/mol.K

(c) J.ohm/sec.K²

(d)
W/m.K

5. Thermal expansion of a material has
units as

(a) J/kg-K

(b) J/mol-K

(c) J.ohm/sec.K

^{2}
(d)
1/°C

6. Polymers have thermal conductivities in
the range of

(a) < 1

(b) 1-10

(c) 10-100

(d) >100

7. Polymers have thermal expansion
coefficients in the range of _____x10

^{-6}.
(a) 0.5-15

(b) 5-25

(c) 25-50

(d) 50-400

8. Coefficient of thermal expansion for
ceramics is the range of _______x10

^{-6}.
(a) 0.5-15

(b) 5-25

(c) 25-50

(d) 50-400

9. Metals have thermal conductivities in
the range of

(a) < 1

(b) 1-5

(c) 5-25

(d) 20-400

10. Heat capacity of most materials is approximately
equal to ________.

(a) R

(b) 2R

(c) 3R

(d) R/2

**Answers**

1. c 2. b 3. d 4. c 5. d

6. a 7. d 8. a 9. d 10. c