试题与答案

质量相等的两个物体,甲吸收的热量是乙吸收的热量的2倍,甲升高的温度是乙升高的温度

题型:填空题

题目:

质量相等的两个物体,甲吸收的热量是乙吸收的热量的2倍,甲升高的温度是乙升高的温度的3倍,则甲、乙比热容之比为______.若它们升高相同的温度,则吸收的热量之比为______.

答案:

∵Q=cm△t,

∴c=

Q
m△t

∴甲、乙比热容之比:

c1
c2
=
Q1
m △t1
Q2
m △t2
=
Q1t2
Q2t1
=
2×1
1×3
=
2
3

吸收的热量之比:

Q1
Q2
=
c1m△t 
c2m△t
=
c1
c2
=
2
3

故答案为:2:3;2:3.

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